diff --git a/01 - JavaScript Drum Kit/index-FINISHED.html b/01 - JavaScript Drum Kit/index-FINISHED.html
index 1a16d0997c..361b8890f1 100644
--- a/01 - JavaScript Drum Kit/index-FINISHED.html	
+++ b/01 - JavaScript Drum Kit/index-FINISHED.html	
@@ -68,7 +68,7 @@
     const key = document.querySelector(`div[data-key="${e.keyCode}"]`);
     if (!audio) return;
 
-    key.classList.add('playing');
+    key.classList.toggle('playing');
     audio.currentTime = 0;
     audio.play();
   }