diff --git a/ep60-firebase-build/public/index.html b/ep60-firebase-build/public/index.html
index 5e6f3e8..0b7af86 100644
--- a/ep60-firebase-build/public/index.html
+++ b/ep60-firebase-build/public/index.html
@@ -20,6 +20,7 @@
     <meta charset="utf-8">
     <title>Firebase Auth</title>
     <link rel="manifest" href="/manifest.json">
+    <script src="bower_components/webcomponentsjs/webcomponents-loader.js"></script>
     <link rel="import" href="/my-app.html">
   </head>
   <body>
