diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/CorePreconditions.java b/core/src/main/java/me/filoghost/holographicdisplays/core/CorePreconditions.java
new file mode 100644
index 00000000..09e93a47
--- /dev/null
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/CorePreconditions.java
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.core;
+
+import me.filoghost.fcommons.Preconditions;
+
+public class CorePreconditions {
+
+    public static void checkMainThread() {
+        Preconditions.checkMainThread("async operation is not supported");
+    }
+
+}
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIHologram.java b/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIHologram.java
index ba642729..374faab7 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIHologram.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIHologram.java
@@ -9,6 +9,7 @@ import me.filoghost.fcommons.Preconditions;
 import me.filoghost.holographicdisplays.api.Position;
 import me.filoghost.holographicdisplays.api.hologram.Hologram;
 import me.filoghost.holographicdisplays.api.hologram.PlaceholderSetting;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import me.filoghost.holographicdisplays.core.base.BaseHologram;
 import me.filoghost.holographicdisplays.core.base.ImmutablePosition;
 import me.filoghost.holographicdisplays.core.tracking.LineTrackerManager;
@@ -53,6 +54,7 @@ class APIHologram extends BaseHologram implements Hologram {
 
     @Override
     public void setPlaceholderSetting(@NotNull PlaceholderSetting placeholderSetting) {
+        CorePreconditions.checkMainThread();
         Preconditions.notNull(placeholderSetting, "placeholderSetting");
         checkNotDeleted();
 
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIItemHologramLine.java b/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIItemHologramLine.java
index eeec9a51..b2634b1a 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIItemHologramLine.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APIItemHologramLine.java
@@ -8,6 +8,7 @@ package me.filoghost.holographicdisplays.core.api.current;
 import me.filoghost.holographicdisplays.api.hologram.line.HologramLineClickListener;
 import me.filoghost.holographicdisplays.api.hologram.line.HologramLinePickupListener;
 import me.filoghost.holographicdisplays.api.hologram.line.ItemHologramLine;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import me.filoghost.holographicdisplays.core.base.BaseItemHologramLine;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
@@ -24,21 +25,18 @@ class APIItemHologramLine extends BaseItemHologramLine implements ItemHologramLi
 
     @Override
     public @Nullable HologramLinePickupListener getPickupListener() {
+        CorePreconditions.checkMainThread();
         return pickupListener;
     }
 
     @Override
     public void setPickupListener(@Nullable HologramLinePickupListener pickupListener) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         this.pickupListener = pickupListener;
     }
 
-    @Override
-    public @Nullable HologramLineClickListener getClickListener() {
-        return clickListener;
-    }
-
     @Override
     public boolean hasPickupCallback() {
         return pickupListener != null;
@@ -51,8 +49,15 @@ class APIItemHologramLine extends BaseItemHologramLine implements ItemHologramLi
         }
     }
 
+    @Override
+    public @Nullable HologramLineClickListener getClickListener() {
+        CorePreconditions.checkMainThread();
+        return clickListener;
+    }
+
     @Override
     public void setClickListener(@Nullable HologramLineClickListener clickListener) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         this.clickListener = clickListener;
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APITextHologramLine.java b/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APITextHologramLine.java
index 9d2ed781..2af1c8c2 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APITextHologramLine.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/api/current/APITextHologramLine.java
@@ -8,6 +8,7 @@ package me.filoghost.holographicdisplays.core.api.current;
 import me.filoghost.holographicdisplays.api.hologram.PlaceholderSetting;
 import me.filoghost.holographicdisplays.api.hologram.line.HologramLineClickListener;
 import me.filoghost.holographicdisplays.api.hologram.line.TextHologramLine;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import me.filoghost.holographicdisplays.core.base.BaseTextHologramLine;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.Nullable;
@@ -30,6 +31,7 @@ class APITextHologramLine extends BaseTextHologramLine implements TextHologramLi
 
     @Override
     public void setClickListener(@Nullable HologramLineClickListener clickListener) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         this.clickListener = clickListener;
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologram.java b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologram.java
index 4570db4d..894e6ad3 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologram.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologram.java
@@ -6,6 +6,7 @@
 package me.filoghost.holographicdisplays.core.base;
 
 import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import me.filoghost.holographicdisplays.core.api.current.DefaultVisibilitySettings;
 import me.filoghost.holographicdisplays.core.tracking.LineTrackerManager;
 import org.bukkit.Chunk;
@@ -70,6 +71,7 @@ public abstract class BaseHologram extends BaseHologramComponent {
     }
 
     public void setPosition(@NotNull ImmutablePosition position) {
+        CorePreconditions.checkMainThread();
         Preconditions.notNull(position, "position");
         checkNotDeleted();
 
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramLines.java b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramLines.java
index 009f8a7d..3b5d3776 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramLines.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramLines.java
@@ -7,6 +7,7 @@ package me.filoghost.holographicdisplays.core.base;
 
 import me.filoghost.holographicdisplays.api.Position;
 import me.filoghost.holographicdisplays.core.CoreGlobalConfig;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -28,18 +29,22 @@ public class BaseHologramLines<T extends EditableHologramLine> implements Iterab
 
     @Override
     public Iterator<T> iterator() {
+        CorePreconditions.checkMainThread();
         return unmodifiableLinesView.iterator();
     }
 
     public int size() {
+        CorePreconditions.checkMainThread();
         return lines.size();
     }
 
     public @NotNull T get(int index) {
+        CorePreconditions.checkMainThread();
         return lines.get(index);
     }
 
     public void add(T line) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         lines.add(line);
@@ -47,6 +52,7 @@ public class BaseHologramLines<T extends EditableHologramLine> implements Iterab
     }
 
     public void insert(int beforeIndex, T line) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         lines.add(beforeIndex, line);
@@ -54,6 +60,7 @@ public class BaseHologramLines<T extends EditableHologramLine> implements Iterab
     }
 
     public void remove(int index) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         lines.remove(index).setDeleted();
@@ -61,6 +68,7 @@ public class BaseHologramLines<T extends EditableHologramLine> implements Iterab
     }
 
     public boolean remove(T line) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         boolean removed = lines.remove(line);
@@ -72,6 +80,7 @@ public class BaseHologramLines<T extends EditableHologramLine> implements Iterab
     }
 
     public void clear() {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         Iterator<T> iterator = lines.iterator();
@@ -105,6 +114,8 @@ public class BaseHologramLines<T extends EditableHologramLine> implements Iterab
     }
 
     public double getHeight() {
+        CorePreconditions.checkMainThread();
+
         if (lines.isEmpty()) {
             return 0;
         }
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramManager.java b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramManager.java
index d1c70606..b0c16a4b 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramManager.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseHologramManager.java
@@ -5,7 +5,7 @@
  */
 package me.filoghost.holographicdisplays.core.base;
 
-import me.filoghost.fcommons.Preconditions;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import org.bukkit.Chunk;
 import org.bukkit.World;
 
@@ -21,7 +21,7 @@ public abstract class BaseHologramManager<H extends BaseHologram> {
     private final List<H> unmodifiableHologramsView = Collections.unmodifiableList(holograms);
 
     protected void addHologram(H hologram) {
-        Preconditions.checkMainThread("async hologram create");
+        CorePreconditions.checkMainThread();
 
         holograms.add(hologram);
     }
@@ -31,14 +31,14 @@ public abstract class BaseHologramManager<H extends BaseHologram> {
     }
 
     public void deleteHologram(H hologram) {
-        Preconditions.checkMainThread("async hologram delete");
+        CorePreconditions.checkMainThread();
 
         hologram.setDeleted();
         holograms.remove(hologram);
     }
 
     public void deleteHologramsIf(Predicate<H> condition) {
-        Preconditions.checkMainThread("async hologram delete");
+        CorePreconditions.checkMainThread();
 
         Iterator<H> iterator = holograms.iterator();
         while (iterator.hasNext()) {
@@ -51,7 +51,7 @@ public abstract class BaseHologramManager<H extends BaseHologram> {
     }
 
     public void deleteHolograms() {
-        Preconditions.checkMainThread("async hologram delete");
+        CorePreconditions.checkMainThread();
 
         Iterator<H> iterator = holograms.iterator();
         while (iterator.hasNext()) {
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseItemHologramLine.java b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseItemHologramLine.java
index 9fc87e29..0ee831a8 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseItemHologramLine.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseItemHologramLine.java
@@ -7,6 +7,7 @@ package me.filoghost.holographicdisplays.core.base;
 
 import me.filoghost.fcommons.Preconditions;
 import me.filoghost.fcommons.logging.Log;
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import me.filoghost.holographicdisplays.nms.common.entity.ItemNMSPacketEntity;
 import me.filoghost.holographicdisplays.core.tracking.ItemLineTracker;
 import me.filoghost.holographicdisplays.core.tracking.LineTrackerManager;
@@ -48,6 +49,7 @@ public abstract class BaseItemHologramLine extends BaseClickableHologramLine {
     }
 
     public void setItemStack(@Nullable ItemStack itemStack) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         if (itemStack != null) {
diff --git a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseTextHologramLine.java b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseTextHologramLine.java
index 13dd8588..5c795a37 100644
--- a/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseTextHologramLine.java
+++ b/core/src/main/java/me/filoghost/holographicdisplays/core/base/BaseTextHologramLine.java
@@ -5,6 +5,7 @@
  */
 package me.filoghost.holographicdisplays.core.base;
 
+import me.filoghost.holographicdisplays.core.CorePreconditions;
 import me.filoghost.holographicdisplays.nms.common.entity.TextNMSPacketEntity;
 import me.filoghost.holographicdisplays.core.tracking.LineTrackerManager;
 import me.filoghost.holographicdisplays.core.tracking.TextLineTracker;
@@ -31,6 +32,7 @@ public abstract class BaseTextHologramLine extends BaseClickableHologramLine {
     }
 
     public void setText(@Nullable String text) {
+        CorePreconditions.checkMainThread();
         checkNotDeleted();
 
         this.text = text;