diff --git a/browser/bower.json b/browser/bower.json
index 35746d0..4a1ca60 100644
--- a/browser/bower.json
+++ b/browser/bower.json
@@ -11,6 +11,7 @@
     "polymer": "^0.5",
     "core-meta": "^0.5",
     "core-transition": "^0.5",
-    "core-component-page": "^0.5"
+    "core-component-page": "^0.5",
+    "webcomponentsjs": "^0.6.0"
   }
 }