diff --git a/Plugin/src/main/java/me/filoghost/chestcommands/legacy/Backup.java b/Plugin/src/main/java/me/filoghost/chestcommands/legacy/Backup.java
index cf11e23..171a8f2 100644
--- a/Plugin/src/main/java/me/filoghost/chestcommands/legacy/Backup.java
+++ b/Plugin/src/main/java/me/filoghost/chestcommands/legacy/Backup.java
@@ -1,3 +1,17 @@
+/*
+ * 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/>.
+ */
 package me.filoghost.chestcommands.legacy;
 
 import me.filoghost.chestcommands.util.Preconditions;
diff --git a/Plugin/src/main/java/me/filoghost/chestcommands/placeholder/scanner/PlaceholderScanner.java b/Plugin/src/main/java/me/filoghost/chestcommands/placeholder/scanner/PlaceholderScanner.java
index bed6b69..1f1cb0f 100644
--- a/Plugin/src/main/java/me/filoghost/chestcommands/placeholder/scanner/PlaceholderScanner.java
+++ b/Plugin/src/main/java/me/filoghost/chestcommands/placeholder/scanner/PlaceholderScanner.java
@@ -1,3 +1,17 @@
+/*
+ * 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/>.
+ */
 package me.filoghost.chestcommands.placeholder.scanner;
 
 import java.util.concurrent.atomic.AtomicBoolean;