diff --git a/src/World.cs b/src/World.cs
index a926cbe..1d91f5c 100644
--- a/src/World.cs
+++ b/src/World.cs
@@ -36,7 +36,7 @@ public World()
     }
 
 	public event Action<EntityView>? OnEntityCreated, OnEntityDeleted;
-	public event Action<EntityView, EcsComponent> OnComponentSet, OnComponentUnset;
+	public event Action<EntityView, EcsComponent>? OnComponentSet, OnComponentUnset;
 	public static event Action<World>? OnPluginInitialization;