diff --git a/bower.json b/bower.json
index 212c963..2957bb7 100644
--- a/bower.json
+++ b/bower.json
@@ -1,12 +1,12 @@
 {
-    "name": "core-dropdown-menu",
-    "private": false,
-    "dependencies": {
-        "polymer": "Polymer/polymer#master",
-        "core-dropdown": "Polymer/core-dropdown#master",
-        "core-icon": "Polymer/core-icon#master",
-        "core-icons": "Polymer/core-icons#master",
-        "core-item": "Polymer/core-item#master",
-        "core-menu": "Polymer/core-menu#master"
-    }
-}
+  "name": "core-dropdown-menu",
+  "private": false,
+  "dependencies": {
+    "polymer": "Polymer/polymer#^0.4.0",
+    "core-dropdown": "Polymer/core-dropdown#^0.4.0",
+    "core-icon": "Polymer/core-icon#^0.4.0",
+    "core-icons": "Polymer/core-icons#^0.4.0",
+    "core-item": "Polymer/core-item#^0.4.0",
+    "core-menu": "Polymer/core-menu#^0.4.0"
+  }
+}
\ No newline at end of file