diff --git a/Assets/AnimationUI/Script/AnimationUI.cs b/Assets/AnimationUI/Script/AnimationUI.cs
index 013b4a6..7e9faf1 100644
--- a/Assets/AnimationUI/Script/AnimationUI.cs
+++ b/Assets/AnimationUI/Script/AnimationUI.cs
@@ -76,7 +76,10 @@ public void PlayReversed()
     [ContextMenu("Stop Animation")]
     public void Stop()
     {
-        foreach(Coroutine coroutine in _coroutines)StopCoroutine(coroutine);
+        foreach(Coroutine coroutine in _coroutines)
+            {
+                if(coroutine != null)StopCoroutine(coroutine);
+            }
         _coroutines.Clear();
     }
 
@@ -1592,4 +1595,4 @@ void UnityEvent(float t)
 // Great work.
 // c0M1NG_d4rkn3SS}
 
-}
\ No newline at end of file
+}