diff --git a/public/index.html b/public/index.html
index e1062d1..bb3d649 100644
--- a/public/index.html
+++ b/public/index.html
@@ -23,7 +23,7 @@
 
     <script
       nomodule
-      src="https://polyfill.io/v3/polyfill.min.js?features=Set%2CMap%2CObject.assign%2Cfetch%2CrequestAnimationFrame%2CNodeList.prototype.forEach%2Cperformance.now"
+      src="https://polyfill.io/v3/polyfill.min.js?features=Set%2CMap%2CObject.assign%2Cfetch%2CrequestAnimationFrame%2CNodeList.prototype.forEach%2CElement.prototype.classList%2Cperformance.now"
     ></script>
     <script src="scripts/AppCollapsible.js"></script>
     <script src="scripts/AppDraggable.js"></script>