diff --git a/Runtime/WorldDebugSystem.cs b/Runtime/WorldDebugSystem.cs
index 5860cf7..5cafde6 100644
--- a/Runtime/WorldDebugSystem.cs
+++ b/Runtime/WorldDebugSystem.cs
@@ -2,7 +2,11 @@
 using Leopotam.EcsLite;
 
 namespace Nomnom.EcsLiteDebugger {
+#if DEBUG || LEOECSLITE_WORLD_EVENTS
   public class WorldDebugSystem: IEcsPreInitSystem, IEcsRunSystem, IEcsDestroySystem, IEcsWorldEventListener {
+#else
+  public class WorldDebugSystem: IEcsPreInitSystem, IEcsRunSystem, IEcsDestroySystem {
+#endif
     private readonly string _name;
     private WorldDebugView _view;
     private List<(int, WorldDebugView.ChangeType)> _dirtyEntities;
diff --git a/package.json b/package.json
index 6b543bb..2ff414e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.nomnom.ecslite-debugger",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "displayName": "ecsLite Debugger",
   "description": "Provides a hierarchy and inspector window to view world entities, and mutate components.",
   "unity": "2021.3",