diff --git a/bower.json b/bower.json
index b15f271..58d2201 100644
--- a/bower.json
+++ b/bower.json
@@ -9,6 +9,7 @@
     "observe-js": "Polymer/observe-js#master"
   },
   "devDependencies": {
+    "tools": "Polymer/tools#master",
     "web-component-tester": "Polymer/web-component-tester#^0.5.1"
   },
   "license": "BSD",