diff --git a/public/index.html b/public/index.html
index de66d55..5184276 100644
--- a/public/index.html
+++ b/public/index.html
@@ -13,6 +13,7 @@
   import NewGame from "/views/NewGame.vue.js"
   import Game from "/views/Game.vue.js"
   import Replay from "/views/Replay.vue.js"
+  import Util from './../common/Util.js'
 
   (async () => {
     const res = await fetch(`/api/conf`)