diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/Hologram.java b/api/src/main/java/me/filoghost/holographicdisplays/api/Hologram.java
index a1dfa7e9..9377ded8 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/Hologram.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/Hologram.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/HologramsAPI.java b/api/src/main/java/me/filoghost/holographicdisplays/api/HologramsAPI.java
index 396ecd55..09b8f882 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/HologramsAPI.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/HologramsAPI.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/VisibilityManager.java b/api/src/main/java/me/filoghost/holographicdisplays/api/VisibilityManager.java
index 900af421..43fdb845 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/VisibilityManager.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/VisibilityManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/handler/PickupHandler.java b/api/src/main/java/me/filoghost/holographicdisplays/api/handler/PickupHandler.java
index f05809f8..096faeeb 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/handler/PickupHandler.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/handler/PickupHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.handler;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/handler/TouchHandler.java b/api/src/main/java/me/filoghost/holographicdisplays/api/handler/TouchHandler.java
index ec83e174..4ee4df33 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/handler/TouchHandler.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/handler/TouchHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.handler;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/internal/BackendAPI.java b/api/src/main/java/me/filoghost/holographicdisplays/api/internal/BackendAPI.java
index fd821427..555f7146 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/internal/BackendAPI.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/internal/BackendAPI.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.internal;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/line/CollectableLine.java b/api/src/main/java/me/filoghost/holographicdisplays/api/line/CollectableLine.java
index 2b1abf6b..b8ed1a21 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/line/CollectableLine.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/line/CollectableLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.line;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/line/HologramLine.java b/api/src/main/java/me/filoghost/holographicdisplays/api/line/HologramLine.java
index c51f58d3..6f7a6cfd 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/line/HologramLine.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/line/HologramLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.line;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/line/ItemLine.java b/api/src/main/java/me/filoghost/holographicdisplays/api/line/ItemLine.java
index 08abbd21..ed7d5aea 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/line/ItemLine.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/line/ItemLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.line;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/line/TextLine.java b/api/src/main/java/me/filoghost/holographicdisplays/api/line/TextLine.java
index 10c48118..217d5da9 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/line/TextLine.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/line/TextLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.line;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/line/TouchableLine.java b/api/src/main/java/me/filoghost/holographicdisplays/api/line/TouchableLine.java
index a3518c2b..18541811 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/line/TouchableLine.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/line/TouchableLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.line;
 
diff --git a/api/src/main/java/me/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java b/api/src/main/java/me/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java
index 0d7e9b7d..1f664fa1 100644
--- a/api/src/main/java/me/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java
+++ b/api/src/main/java/me/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.api.placeholder;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/disk/ConfigNode.java b/config/src/main/java/me/filoghost/holographicdisplays/disk/ConfigNode.java
index a7b3620e..c3d64c32 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/disk/ConfigNode.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/disk/ConfigNode.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/disk/Configuration.java b/config/src/main/java/me/filoghost/holographicdisplays/disk/Configuration.java
index b2025c8f..be378577 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/disk/Configuration.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/disk/Configuration.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/disk/LocationSerializer.java b/config/src/main/java/me/filoghost/holographicdisplays/disk/LocationSerializer.java
index b09835e0..cd843c6d 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/disk/LocationSerializer.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/disk/LocationSerializer.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/disk/ServerAddress.java b/config/src/main/java/me/filoghost/holographicdisplays/disk/ServerAddress.java
index 37dbea76..77248359 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/disk/ServerAddress.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/disk/ServerAddress.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/disk/StringConverter.java b/config/src/main/java/me/filoghost/holographicdisplays/disk/StringConverter.java
index a4998ebf..4e9571b5 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/disk/StringConverter.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/disk/StringConverter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/disk/UnicodeSymbols.java b/config/src/main/java/me/filoghost/holographicdisplays/disk/UnicodeSymbols.java
index 8cc04055..2cf7b3ae 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/disk/UnicodeSymbols.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/disk/UnicodeSymbols.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/exception/InvalidFormatException.java b/config/src/main/java/me/filoghost/holographicdisplays/exception/InvalidFormatException.java
index 85ff0df5..8c68f921 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/exception/InvalidFormatException.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/exception/InvalidFormatException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/config/src/main/java/me/filoghost/holographicdisplays/exception/WorldNotFoundException.java b/config/src/main/java/me/filoghost/holographicdisplays/exception/WorldNotFoundException.java
index 45d98cc2..7e32b35e 100644
--- a/config/src/main/java/me/filoghost/holographicdisplays/exception/WorldNotFoundException.java
+++ b/config/src/main/java/me/filoghost/holographicdisplays/exception/WorldNotFoundException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/example/death-holograms/src/main/java/me/filoghost/example/deathholograms/DeathHolograms.java b/example/death-holograms/src/main/java/me/filoghost/example/deathholograms/DeathHolograms.java
index 21ec7a30..3a7c51ff 100644
--- a/example/death-holograms/src/main/java/me/filoghost/example/deathholograms/DeathHolograms.java
+++ b/example/death-holograms/src/main/java/me/filoghost/example/deathholograms/DeathHolograms.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.example.deathholograms;
 
diff --git a/example/power-ups/src/main/java/me/filoghost/example/powerups/PowerUps.java b/example/power-ups/src/main/java/me/filoghost/example/powerups/PowerUps.java
index 737b57f1..67253771 100644
--- a/example/power-ups/src/main/java/me/filoghost/example/powerups/PowerUps.java
+++ b/example/power-ups/src/main/java/me/filoghost/example/powerups/PowerUps.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.example.powerups;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/FloatingItem.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/FloatingItem.java
index 786db9ac..f2a36ae5 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/FloatingItem.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/FloatingItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/Hologram.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/Hologram.java
index f2afca4a..67ad7699 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/Hologram.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/Hologram.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/HolographicDisplaysAPI.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/HolographicDisplaysAPI.java
index 022a9f6a..d8d92624 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/HolographicDisplaysAPI.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/HolographicDisplaysAPI.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/ItemTouchHandler.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/ItemTouchHandler.java
index 5968b3f7..06fe6459 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/ItemTouchHandler.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/ItemTouchHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/PickupHandler.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/PickupHandler.java
index 1a359853..83d7de7c 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/PickupHandler.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/PickupHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/TouchHandler.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/TouchHandler.java
index ca3f2727..979158ed 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/TouchHandler.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/TouchHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/FloatingItemAdapter.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/FloatingItemAdapter.java
index 18f7386b..c1347278 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/FloatingItemAdapter.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/FloatingItemAdapter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api.adapter;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramAdapter.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramAdapter.java
index faa1b880..883af507 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramAdapter.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramAdapter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api.adapter;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramTouchHandlerAdapter.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramTouchHandlerAdapter.java
index 7a85de19..576be146 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramTouchHandlerAdapter.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/HologramTouchHandlerAdapter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api.adapter;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/ItemTouchHandlerAdapter.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/ItemTouchHandlerAdapter.java
index 835fe3bc..7985313c 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/ItemTouchHandlerAdapter.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/ItemTouchHandlerAdapter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api.adapter;
 
diff --git a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/PickupHandlerAdapter.java b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/PickupHandlerAdapter.java
index cfc02c91..add28531 100644
--- a/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/PickupHandlerAdapter.java
+++ b/legacy-v1/src/main/java/com/gmail/filoghost/holograms/api/adapter/PickupHandlerAdapter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holograms.api.adapter;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/Hologram.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/Hologram.java
index 2b3ca71b..6b46096d 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/Hologram.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/Hologram.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/HologramsAPI.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/HologramsAPI.java
index fda6bbf7..831780a1 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/HologramsAPI.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/HologramsAPI.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/VisibilityManager.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/VisibilityManager.java
index 069cfd74..aac81ef0 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/VisibilityManager.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/VisibilityManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/PickupHandler.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/PickupHandler.java
index 4a072678..6f3b9bda 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/PickupHandler.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/PickupHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.handler;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/TouchHandler.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/TouchHandler.java
index 31b88d47..f86d8743 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/TouchHandler.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/handler/TouchHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.handler;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/internal/BackendAPI.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/internal/BackendAPI.java
index c85ee249..714e7ae2 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/internal/BackendAPI.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/internal/BackendAPI.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.internal;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/CollectableLine.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/CollectableLine.java
index 9f4147c9..3f246adb 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/CollectableLine.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/CollectableLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.line;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/HologramLine.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/HologramLine.java
index bfaf20c9..26db53c8 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/HologramLine.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/HologramLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.line;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/ItemLine.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/ItemLine.java
index 2287dce2..25003120 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/ItemLine.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/ItemLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.line;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TextLine.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TextLine.java
index 35e704e5..57cb7dce 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TextLine.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TextLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.line;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TouchableLine.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TouchableLine.java
index 25a6f3cb..65b7a526 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TouchableLine.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/line/TouchableLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.line;
 
diff --git a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java
index 9a74aade..d54eab47 100644
--- a/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java
+++ b/legacy-v2/src/main/java/com/gmail/filoghost/holographicdisplays/api/placeholder/PlaceholderReplacer.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package com.gmail.filoghost.holographicdisplays.api.placeholder;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ChatComponentAdapter.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ChatComponentAdapter.java
index 0133de63..52cc2e3a 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ChatComponentAdapter.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ChatComponentAdapter.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/CustomNameHelper.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/CustomNameHelper.java
index 116cecc6..a5ab6781 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/CustomNameHelper.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/CustomNameHelper.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ItemPickupManager.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ItemPickupManager.java
index 12f36b56..4006d603 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ItemPickupManager.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/ItemPickupManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/NMSManager.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/NMSManager.java
index ae8ae4d0..2d75ac8c 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/NMSManager.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/NMSManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSArmorStand.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSArmorStand.java
index 4cd9659d..1faeb4bb 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSArmorStand.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces.entity;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSCanMount.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSCanMount.java
index cd60d6b0..06a0d1e8 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSCanMount.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSCanMount.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces.entity;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSEntityBase.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSEntityBase.java
index 74b1e157..1f290682 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSEntityBase.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSEntityBase.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces.entity;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSItem.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSItem.java
index 26add5d6..c8f98772 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSItem.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces.entity;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSNameable.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSNameable.java
index 5660fb9b..e5bd5655 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSNameable.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSNameable.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces.entity;
 
diff --git a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSSlime.java b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSSlime.java
index 89e15592..e8f17596 100644
--- a/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSSlime.java
+++ b/nms/interfaces/src/main/java/me/filoghost/holographicdisplays/nms/interfaces/entity/NMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.interfaces.entity;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSArmorStand.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSArmorStand.java
index 5573e233..26832a3f 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSArmorStand.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSItem.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSItem.java
index 533ad6c2..fa3ee017 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSItem.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSSlime.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSSlime.java
index 69a887ab..8be0b616 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSSlime.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSArmorStand.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSArmorStand.java
index 59263276..34baa992 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSArmorStand.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSItem.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSItem.java
index 2f40c618..3a85be94 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSItem.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSSlime.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSSlime.java
index 0e310ab1..7328fbc6 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSSlime.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NmsManagerImpl.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NmsManagerImpl.java
index a2e8d6db..23186611 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NmsManagerImpl.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NullBoundingBox.java b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NullBoundingBox.java
index 9a940419..96497c7f 100644
--- a/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NullBoundingBox.java
+++ b/nms/v1_10_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_10_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_10_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSArmorStand.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSArmorStand.java
index bf770d4e..0e72ee54 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSArmorStand.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSItem.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSItem.java
index 6bf00e11..3ff85216 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSItem.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSSlime.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSSlime.java
index 66251971..142dcd8c 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSSlime.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSArmorStand.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSArmorStand.java
index 188fa14a..06b6bb23 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSArmorStand.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSItem.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSItem.java
index 471e93b8..511ea0f1 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSItem.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSSlime.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSSlime.java
index 28d82270..a244240c 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSSlime.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NmsManagerImpl.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NmsManagerImpl.java
index c29853c4..731bb589 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NmsManagerImpl.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NullBoundingBox.java b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NullBoundingBox.java
index c813d0f7..05610626 100644
--- a/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NullBoundingBox.java
+++ b/nms/v1_11_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_11_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_11_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSArmorStand.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSArmorStand.java
index 41b33dd2..89f43b70 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSArmorStand.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSItem.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSItem.java
index cdc8d330..34ed6078 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSItem.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSSlime.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSSlime.java
index 1ea51ad8..0a996d36 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSSlime.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSArmorStand.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSArmorStand.java
index d45fbcf5..4f294944 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSArmorStand.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSItem.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSItem.java
index 97e1aef0..f08bcaf3 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSItem.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSSlime.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSSlime.java
index 113b06f7..bcfd2d55 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSSlime.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NmsManagerImpl.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NmsManagerImpl.java
index 93cbc60b..2aae4387 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NmsManagerImpl.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NullBoundingBox.java b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NullBoundingBox.java
index 0fb7cccd..ae1cd5c2 100644
--- a/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NullBoundingBox.java
+++ b/nms/v1_12_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_12_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_12_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSArmorStand.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSArmorStand.java
index 0b20aa62..459a437c 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSArmorStand.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSItem.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSItem.java
index 5457f560..dd38e52b 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSItem.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSSlime.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSSlime.java
index 9c76b5f2..a1304565 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSSlime.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSArmorStand.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSArmorStand.java
index b41172c7..503cc5b1 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSArmorStand.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSItem.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSItem.java
index 4defe6ed..53d3b29f 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSItem.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSSlime.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSSlime.java
index 2b86b9c5..5de17004 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSSlime.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NmsManagerImpl.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NmsManagerImpl.java
index acb0f737..59832b0e 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NmsManagerImpl.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NullBoundingBox.java b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NullBoundingBox.java
index 18e13b10..f36458cd 100644
--- a/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NullBoundingBox.java
+++ b/nms/v1_13_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R1;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSArmorStand.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSArmorStand.java
index 6a9011af..829e2f98 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSArmorStand.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSItem.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSItem.java
index 0ba18c21..2d50a3b4 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSItem.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSSlime.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSSlime.java
index 56792a65..8593d3c8 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSSlime.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSArmorStand.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSArmorStand.java
index 64bd1912..5a556c92 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSArmorStand.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSItem.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSItem.java
index 00d903f3..9b21be6a 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSItem.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSSlime.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSSlime.java
index 82f7c3c5..f03b6160 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSSlime.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NmsManagerImpl.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NmsManagerImpl.java
index 8a4ab64a..caeed23c 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NmsManagerImpl.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NullBoundingBox.java b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NullBoundingBox.java
index 6126ce4b..5f2bb8de 100644
--- a/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NullBoundingBox.java
+++ b/nms/v1_13_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_13_R2/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_13_R2;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSArmorStand.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSArmorStand.java
index ab4712e5..640397cc 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSArmorStand.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSItem.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSItem.java
index 7136ebba..88188e4d 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSItem.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSSlime.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSSlime.java
index 81db889f..9dc9ce9f 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSSlime.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSArmorStand.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSArmorStand.java
index 07c0f99f..6aee68f0 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSArmorStand.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSItem.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSItem.java
index bc4efe08..4b164f01 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSItem.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSSlime.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSSlime.java
index d78b4452..d0460206 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSSlime.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NmsManagerImpl.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NmsManagerImpl.java
index 010c6c0f..2042c7f2 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NmsManagerImpl.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NullBoundingBox.java b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NullBoundingBox.java
index bf9824d0..ab481c56 100644
--- a/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NullBoundingBox.java
+++ b/nms/v1_14_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_14_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_14_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSArmorStand.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSArmorStand.java
index 6ec0061f..245dd231 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSArmorStand.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSItem.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSItem.java
index c0596433..353c056a 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSItem.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSSlime.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSSlime.java
index b4f19f72..9f175965 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSSlime.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSArmorStand.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSArmorStand.java
index 795c0ef6..c0e3d857 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSArmorStand.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSItem.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSItem.java
index fcf537bf..6f388c2c 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSItem.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSSlime.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSSlime.java
index 376d0e74..9c91b827 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSSlime.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NmsManagerImpl.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NmsManagerImpl.java
index 21189f08..6ed689a4 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NmsManagerImpl.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NullBoundingBox.java b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NullBoundingBox.java
index c495c9d3..dfe16bc3 100644
--- a/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NullBoundingBox.java
+++ b/nms/v1_15_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_15_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_15_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSArmorStand.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSArmorStand.java
index b403b3e0..c84f1992 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSArmorStand.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSItem.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSItem.java
index 6a03f3ef..521e939f 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSItem.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSSlime.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSSlime.java
index 129948a3..f013b143 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSSlime.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSArmorStand.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSArmorStand.java
index c944a2b3..e6e984ab 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSArmorStand.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSItem.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSItem.java
index 8845438c..414f23e7 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSItem.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSSlime.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSSlime.java
index a0dfb278..631631b1 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSSlime.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NmsManagerImpl.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NmsManagerImpl.java
index a8b340cc..f8fe826c 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NmsManagerImpl.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NullBoundingBox.java b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NullBoundingBox.java
index 82f24007..39f17671 100644
--- a/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NullBoundingBox.java
+++ b/nms/v1_16_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R1;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSArmorStand.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSArmorStand.java
index 50ef79d8..095a161b 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSArmorStand.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSItem.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSItem.java
index 8245da0b..69285375 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSItem.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSSlime.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSSlime.java
index 854b4bcd..a924e119 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSSlime.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSArmorStand.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSArmorStand.java
index 97cc4328..9a2d38c1 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSArmorStand.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSItem.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSItem.java
index bbb7f808..225a25ec 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSItem.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSSlime.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSSlime.java
index fde54352..1d17c544 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSSlime.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NmsManagerImpl.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NmsManagerImpl.java
index 721c1b0f..3f094d3a 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NmsManagerImpl.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NullBoundingBox.java b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NullBoundingBox.java
index b68ceb12..a2a156f3 100644
--- a/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NullBoundingBox.java
+++ b/nms/v1_16_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R2/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R2;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSArmorStand.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSArmorStand.java
index 268c239f..22d69bf8 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSArmorStand.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSItem.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSItem.java
index 0ef45715..1a415092 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSItem.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSSlime.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSSlime.java
index c28998f4..14a0dbd2 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSSlime.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSArmorStand.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSArmorStand.java
index ebee84ff..1b039d7c 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSArmorStand.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSItem.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSItem.java
index 935c16da..2d713711 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSItem.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSSlime.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSSlime.java
index 05cd1eea..d32d5e50 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSSlime.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NmsManagerImpl.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NmsManagerImpl.java
index 030c3171..9745091b 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NmsManagerImpl.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NullBoundingBox.java b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NullBoundingBox.java
index f650abab..95b9864f 100644
--- a/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NullBoundingBox.java
+++ b/nms/v1_16_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_16_R3/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_16_R3;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSArmorStand.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSArmorStand.java
index ac009da4..812b418d 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSArmorStand.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSItem.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSItem.java
index f8c2a956..164a5d6b 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSItem.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSSlime.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSSlime.java
index 7179d212..f404a382 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSSlime.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSArmorStand.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSArmorStand.java
index 8660cc0c..7c75c3bf 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSArmorStand.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSItem.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSItem.java
index d845fe6a..ddd8029b 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSItem.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSSlime.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSSlime.java
index 54b4073f..6a3a7e09 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSSlime.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NmsManagerImpl.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NmsManagerImpl.java
index 96ae6897..9986681c 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NmsManagerImpl.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NullBoundingBox.java b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NullBoundingBox.java
index 934cd2a6..54c7ca1c 100644
--- a/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NullBoundingBox.java
+++ b/nms/v1_8_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R2/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R2;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSArmorStand.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSArmorStand.java
index 15e5e362..3c114b23 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSArmorStand.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSItem.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSItem.java
index b28752dd..eb9dca14 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSItem.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSSlime.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSSlime.java
index a2a5826f..5d34a5d0 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSSlime.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSArmorStand.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSArmorStand.java
index 4501c388..1d8a908f 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSArmorStand.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSItem.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSItem.java
index 6d6ca5a3..1801b902 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSItem.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSSlime.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSSlime.java
index dec36ea1..84084dfb 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSSlime.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NmsManagerImpl.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NmsManagerImpl.java
index 4bf3562d..af2b11b2 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NmsManagerImpl.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NullBoundingBox.java b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NullBoundingBox.java
index 663d134b..7ba5b35c 100644
--- a/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NullBoundingBox.java
+++ b/nms/v1_8_r3/src/main/java/me/filoghost/holographicdisplays/nms/v1_8_R3/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_8_R3;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSArmorStand.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSArmorStand.java
index cf77a567..788b193a 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSArmorStand.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSItem.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSItem.java
index 85f03605..fb29b73e 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSItem.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSSlime.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSSlime.java
index 14507ed0..790b95bd 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSSlime.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSArmorStand.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSArmorStand.java
index 42c004df..f1e80b91 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSArmorStand.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSItem.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSItem.java
index 0761e167..0cd8558c 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSItem.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSSlime.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSSlime.java
index 7c366ffc..12c69472 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSSlime.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NmsManagerImpl.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NmsManagerImpl.java
index 384a6d7c..8cdaab13 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NmsManagerImpl.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NullBoundingBox.java b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NullBoundingBox.java
index 0006ab64..b8264ca9 100644
--- a/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NullBoundingBox.java
+++ b/nms/v1_9_r1/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R1/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R1;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSArmorStand.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSArmorStand.java
index 02bdbd17..dd548e35 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSArmorStand.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSItem.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSItem.java
index df99eab7..74f52a6e 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSItem.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSSlime.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSSlime.java
index 591969dc..c79307e9 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSSlime.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/CraftNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSArmorStand.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSArmorStand.java
index 33069665..5c9e98a5 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSArmorStand.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSArmorStand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSItem.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSItem.java
index baf384f8..c5daa074 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSItem.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSItem.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSSlime.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSSlime.java
index 93cabfca..82dc360c 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSSlime.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/EntityNMSSlime.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NmsManagerImpl.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NmsManagerImpl.java
index d4c90c48..ebc90ada 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NmsManagerImpl.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NmsManagerImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NullBoundingBox.java b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NullBoundingBox.java
index d85e75aa..a347c47e 100644
--- a/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NullBoundingBox.java
+++ b/nms/v1_9_r2/src/main/java/me/filoghost/holographicdisplays/nms/v1_9_R2/NullBoundingBox.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.nms.v1_9_R2;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/HolographicDisplays.java b/plugin/src/main/java/me/filoghost/holographicdisplays/HolographicDisplays.java
index 62cad595..c57e7b40 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/HolographicDisplays.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/HolographicDisplays.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeChannel.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeChannel.java
index b0b29456..3cf1ecec 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeChannel.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeChannel.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
+ * Copyright (C) filoghost and contributors
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.bungeecord;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerInfo.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerInfo.java
index 25665c28..10b83093 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerInfo.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerInfo.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.bungeecord;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerTracker.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerTracker.java
index 2d7b440e..a82096e0 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerTracker.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerTracker.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.bungeecord;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PacketUtils.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PacketUtils.java
index d9e1b830..35e77209 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PacketUtils.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PacketUtils.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.bungeecord.serverpinger;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PingResponse.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PingResponse.java
index b612ca96..e2f01547 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PingResponse.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/PingResponse.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.bungeecord.serverpinger;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/ServerPinger.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/ServerPinger.java
index 11c6b35c..0a8ac9c0 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/ServerPinger.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/serverpinger/ServerPinger.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.bungeecord.serverpinger;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/ProtocolLibHook.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/ProtocolLibHook.java
index d33b5dd6..da7ffe73 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/ProtocolLibHook.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/ProtocolLibHook.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.protocollib;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/DebugHelper.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/DebugHelper.java
index c88f69ef..2eb292a1 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/DebugHelper.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/DebugHelper.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.protocollib.current;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/MetadataHelper.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/MetadataHelper.java
index 447f68fb..ae6d6fe4 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/MetadataHelper.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/MetadataHelper.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.protocollib.current;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/PacketHelper.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/PacketHelper.java
index 84680821..380de5a3 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/PacketHelper.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/PacketHelper.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.protocollib.current;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/ProtocolLibHookImpl.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/ProtocolLibHookImpl.java
index 43cfc32d..c7b4cf5f 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/ProtocolLibHookImpl.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/ProtocolLibHookImpl.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.protocollib.current;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/packet/EntityRelatedPacketWrapper.java b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/packet/EntityRelatedPacketWrapper.java
index fe48e2b1..b5f12407 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/packet/EntityRelatedPacketWrapper.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/bridge/protocollib/current/packet/EntityRelatedPacketWrapper.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.bridge.protocollib.current.packet;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Colors.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Colors.java
index d68e2d9c..b70230f9 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Colors.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Colors.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/CommandValidator.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/CommandValidator.java
index a3fbf308..2f31ab26 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/CommandValidator.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/CommandValidator.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Strings.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Strings.java
index b6d10092..86ce30cc 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Strings.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/Strings.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramSubCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramSubCommand.java
index 991e4276..25467136 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramSubCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramSubCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramsCommandHandler.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramsCommandHandler.java
index 9e5fcf14..6a628481 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramsCommandHandler.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/HologramsCommandHandler.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AddlineCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AddlineCommand.java
index f6c03dad..ffc89444 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AddlineCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AddlineCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AlignCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AlignCommand.java
index fa51e759..8429fc4c 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AlignCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/AlignCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CopyCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CopyCommand.java
index 41b1f07c..4d12b852 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CopyCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CopyCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CreateCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CreateCommand.java
index 75aaea22..51cbbf60 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CreateCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/CreateCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DebugCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DebugCommand.java
index 64fc6806..9b7ca35c 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DebugCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DebugCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DeleteCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DeleteCommand.java
index d54df7de..d6734d8b 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DeleteCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/DeleteCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/EditCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/EditCommand.java
index 185d5738..d477d324 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/EditCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/EditCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/HelpCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/HelpCommand.java
index bf5c2806..afba8d97 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/HelpCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/HelpCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InfoCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InfoCommand.java
index 2242bc02..4161cdf5 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InfoCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InfoCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InsertlineCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InsertlineCommand.java
index 7e784f34..c3da49ba 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InsertlineCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/InsertlineCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ListCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ListCommand.java
index 7afa7d69..6780e744 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ListCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ListCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/MovehereCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/MovehereCommand.java
index 57ccdcd4..13de4c03 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/MovehereCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/MovehereCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/NearCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/NearCommand.java
index 1bc45eac..a41d4fa0 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/NearCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/NearCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadimageCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadimageCommand.java
index aa6ebe59..568c2945 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadimageCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadimageCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadtextCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadtextCommand.java
index d82492c2..6385da21 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadtextCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReadtextCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReloadCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReloadCommand.java
index e0e4c8fd..973c6f3e 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReloadCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/ReloadCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/RemovelineCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/RemovelineCommand.java
index 8c4fded3..adc2e613 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/RemovelineCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/RemovelineCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/SetlineCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/SetlineCommand.java
index c495fcdc..b9c23946 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/SetlineCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/SetlineCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/TeleportCommand.java b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/TeleportCommand.java
index 26753371..76a6fc8d 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/TeleportCommand.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/commands/main/subs/TeleportCommand.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.commands.main.subs;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramDatabase.java b/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramDatabase.java
index 5d824faa..997b7088 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramDatabase.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramDatabase.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParser.java b/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParser.java
index 17fcb2bd..c68c9bd0 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParser.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParser.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.disk;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/event/HolographicDisplaysReloadEvent.java b/plugin/src/main/java/me/filoghost/holographicdisplays/event/HolographicDisplaysReloadEvent.java
index 8e1b916e..ae2b108a 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/event/HolographicDisplaysReloadEvent.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/event/HolographicDisplaysReloadEvent.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.event;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/event/NamedHologramEditedEvent.java b/plugin/src/main/java/me/filoghost/holographicdisplays/event/NamedHologramEditedEvent.java
index fb3243b6..9e1e77f8 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/event/NamedHologramEditedEvent.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/event/NamedHologramEditedEvent.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.event;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/CommandException.java b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/CommandException.java
index ac252c38..1f0a44bc 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/CommandException.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/CommandException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramLineParseException.java b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramLineParseException.java
index a54e9bd1..62688659 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramLineParseException.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramLineParseException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramNotFoundException.java b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramNotFoundException.java
index 0fa73d84..fe15cc5b 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramNotFoundException.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/HologramNotFoundException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/TooWideException.java b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/TooWideException.java
index d1593a46..9e59a2bd 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/exception/TooWideException.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/exception/TooWideException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/image/ImageMessage.java b/plugin/src/main/java/me/filoghost/holographicdisplays/image/ImageMessage.java
index 076ae66c..c6a2f5e6 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/image/ImageMessage.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/image/ImageMessage.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.image;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/listener/MainListener.java b/plugin/src/main/java/me/filoghost/holographicdisplays/listener/MainListener.java
index b13efcf1..d5dee329 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/listener/MainListener.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/listener/MainListener.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.listener;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftHologram.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftHologram.java
index 855989f5..05987a8b 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftHologram.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftHologram.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftVisibilityManager.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftVisibilityManager.java
index bae9365a..13e48c44 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftVisibilityManager.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/CraftVisibilityManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/DefaultBackendAPI.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/DefaultBackendAPI.java
index dca90801..548f7c96 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/DefaultBackendAPI.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/DefaultBackendAPI.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologram.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologram.java
index a37ddaa2..6e7c20da 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologram.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologram.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologramManager.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologramManager.java
index 7d26fbb9..c6369e34 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologramManager.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/NamedHologramManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologram.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologram.java
index d6a8a347..9147861a 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologram.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologram.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologramManager.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologramManager.java
index 6c8a4458..6128da93 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologramManager.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/PluginHologramManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftHologramLine.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftHologramLine.java
index ec3f6fa8..98102fcd 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftHologramLine.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftHologramLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object.line;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftItemLine.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftItemLine.java
index 755a7c96..dffc09d9 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftItemLine.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftItemLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object.line;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTextLine.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTextLine.java
index 159165c9..9aa7e489 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTextLine.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTextLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object.line;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchSlimeLine.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchSlimeLine.java
index fb975d06..6b07d4db 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchSlimeLine.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchSlimeLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object.line;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchableLine.java b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchableLine.java
index 50a44aba..3a6a504e 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchableLine.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/object/line/CraftTouchableLine.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.object.line;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/AnimationsRegister.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/AnimationsRegister.java
index 80fbb8d2..b4faab7d 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/AnimationsRegister.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/AnimationsRegister.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/CyclicPlaceholderReplacer.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/CyclicPlaceholderReplacer.java
index d6134519..085b7f52 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/CyclicPlaceholderReplacer.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/CyclicPlaceholderReplacer.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/DynamicLineData.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/DynamicLineData.java
index 5560d012..2093936d 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/DynamicLineData.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/DynamicLineData.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/Placeholder.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/Placeholder.java
index abb70420..fd76ff76 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/Placeholder.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/Placeholder.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersManager.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersManager.java
index 3ab16dbf..31794410 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersManager.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersManager.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersRegister.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersRegister.java
index 649d352f..56a98463 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersRegister.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/PlaceholdersRegister.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/RelativePlaceholder.java b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/RelativePlaceholder.java
index e3c1058b..24eb6226 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/RelativePlaceholder.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/placeholder/RelativePlaceholder.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.placeholder;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/task/BungeeCleanupTask.java b/plugin/src/main/java/me/filoghost/holographicdisplays/task/BungeeCleanupTask.java
index 69b3b20f..eca31c1f 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/task/BungeeCleanupTask.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/task/BungeeCleanupTask.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.task;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/task/StartupLoadHologramsTask.java b/plugin/src/main/java/me/filoghost/holographicdisplays/task/StartupLoadHologramsTask.java
index 6b716b38..b87198e1 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/task/StartupLoadHologramsTask.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/task/StartupLoadHologramsTask.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.task;
 
diff --git a/plugin/src/main/java/me/filoghost/holographicdisplays/task/WorldPlayerCounterTask.java b/plugin/src/main/java/me/filoghost/holographicdisplays/task/WorldPlayerCounterTask.java
index 613eb777..fa6f21b1 100644
--- a/plugin/src/main/java/me/filoghost/holographicdisplays/task/WorldPlayerCounterTask.java
+++ b/plugin/src/main/java/me/filoghost/holographicdisplays/task/WorldPlayerCounterTask.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.task;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/exception/UnreadableImageException.java b/utils/src/main/java/me/filoghost/holographicdisplays/exception/UnreadableImageException.java
index 1975d1f4..371433d9 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/exception/UnreadableImageException.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/exception/UnreadableImageException.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.exception;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/ConsoleLogger.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/ConsoleLogger.java
index f3818bde..2e9f9074 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/ConsoleLogger.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/ConsoleLogger.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/FileUtils.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/FileUtils.java
index c813fed6..0dc06d3f 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/FileUtils.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/FileUtils.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/ItemUtils.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/ItemUtils.java
index 9662bc95..70f6155b 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/ItemUtils.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/ItemUtils.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/NMSVersion.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/NMSVersion.java
index b86202f4..8ab4d157 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/NMSVersion.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/NMSVersion.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/Offsets.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/Offsets.java
index 81020b5d..a0335ecf 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/Offsets.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/Offsets.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/Utils.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/Utils.java
index ab155000..22b7104a 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/Utils.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/Utils.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/Validator.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/Validator.java
index e709a762..0701950f 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/Validator.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/Validator.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/VersionUtils.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/VersionUtils.java
index 093bbb93..16bba30e 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/VersionUtils.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/VersionUtils.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByte.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByte.java
index 88c767ee..f58adc7b 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByte.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByte.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByteArray.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByteArray.java
index e19e015f..0c4d3eb7 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByteArray.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTByteArray.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 import java.util.Arrays;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTCompound.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTCompound.java
index 322ac130..fbd107bf 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTCompound.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTCompound.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 import java.util.Collections;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTDouble.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTDouble.java
index 772eadc4..ad5c7081 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTDouble.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTDouble.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTFloat.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTFloat.java
index 919ae1ac..59c8bf54 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTFloat.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTFloat.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTInt.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTInt.java
index af133df3..a5abfa13 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTInt.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTInt.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTIntArray.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTIntArray.java
index cf0fb6ad..c134dd52 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTIntArray.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTIntArray.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 import java.util.Arrays;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTList.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTList.java
index ab5cea73..de36e2d0 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTList.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTList.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 import java.util.ArrayList;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLong.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLong.java
index 054de4b9..48c7a7a5 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLong.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLong.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLongArray.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLongArray.java
index 48bffa75..f14f9c31 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLongArray.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTLongArray.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 import java.util.Arrays;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTShort.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTShort.java
index 8bff3620..d903f404 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTShort.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTShort.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTString.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTString.java
index d73c2313..17077cf5 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTString.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTString.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTTag.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTTag.java
index 1d5bef12..48d1b653 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTTag.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTTag.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTType.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTType.java
index 6618d2f8..942cd3b5 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTType.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/NBTType.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt;
 
 /**
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParseException.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParseException.java
index 51af4faf..73ba923a 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParseException.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParseException.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt.parser;
 
 import org.bukkit.ChatColor;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParser.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParser.java
index 81653720..836c04ae 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParser.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/nbt/parser/MojangsonParser.java
@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) Jan Schultke
+ *
+ * SPDX-License-Identifier: MIT
+ */
 package me.filoghost.holographicdisplays.util.nbt.parser;
 
 import me.filoghost.holographicdisplays.util.nbt.NBTByte;
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectField.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectField.java
index 306cc34b..d6fae260 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectField.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectField.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util.reflection;
 
diff --git a/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectMethod.java b/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectMethod.java
index 2f3635b0..0ed694cc 100644
--- a/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectMethod.java
+++ b/utils/src/main/java/me/filoghost/holographicdisplays/util/reflection/ReflectMethod.java
@@ -1,16 +1,7 @@
 /*
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *  
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
- *  
- *  You should have received a copy of the GNU General Public License
- *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 package me.filoghost.holographicdisplays.util.reflection;