diff --git a/sw.js b/sw.js
index 140d0d8..ec22340 100644
--- a/sw.js
+++ b/sw.js
@@ -9,7 +9,7 @@ async function initCache() {
     '/components/header.js',
     '/components/nav-menu.js',
     '/components/dialog.js',
-    '/forms/button-group.js,
+    '/forms/button-group.js',
     '/menu/dropdown.js',
   ])
 }