diff --git a/sw.js b/sw.js
index ec22340..0ff9269 100644
--- a/sw.js
+++ b/sw.js
@@ -9,9 +9,9 @@ async function initCache() {
     '/components/header.js',
     '/components/nav-menu.js',
     '/components/dialog.js',
-    '/forms/button-group.js',
-    '/menu/dropdown.js',
-  ])
+    '/forms/button-group.js,
+    '/menu/dropdown.js,
+  ]) //1
 }
 
 self.addEventListener("install", event => {