diff --git a/src/main/java/me/clip/placeholderapi/events/ExpansionRegisterEvent.java b/src/main/java/me/clip/placeholderapi/events/ExpansionRegisterEvent.java
index 664475a..9bdff16 100644
--- a/src/main/java/me/clip/placeholderapi/events/ExpansionRegisterEvent.java
+++ b/src/main/java/me/clip/placeholderapi/events/ExpansionRegisterEvent.java
@@ -21,13 +21,15 @@
 package me.clip.placeholderapi.events;
 
 import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.event.Cancellable;
 import org.bukkit.event.Event;
 import org.bukkit.event.HandlerList;
 
-public class ExpansionRegisterEvent extends Event {
+public class ExpansionRegisterEvent extends Event implements Cancellable {
 
   private static final HandlerList HANDLERS = new HandlerList();
   private PlaceholderExpansion expansion;
+  private boolean isCancelled;
 
   public ExpansionRegisterEvent(PlaceholderExpansion expansion) {
     this.expansion = expansion;
@@ -45,4 +47,14 @@ public class ExpansionRegisterEvent extends Event {
   public PlaceholderExpansion getExpansion() {
     return expansion;
   }
+
+  @Override
+  public boolean isCancelled() {
+    return isCancelled;
+  }
+
+  @Override
+  public void setCancelled(boolean b) {
+    this.isCancelled = b;
+  }
 }