diff --git a/bower.json b/bower.json
index ec742b0..9627506 100644
--- a/bower.json
+++ b/bower.json
@@ -2,16 +2,16 @@
   "name": "core-doc-viewer",
   "private": true,
   "dependencies": {
-    "core-ajax": "Polymer/core-ajax#master",
-    "core-layout": "Polymer/core-layout#master",
-    "core-menu": "Polymer/core-menu#master",
-    "core-item": "Polymer/core-item#master",
-    "core-toolbar": "Polymer/core-toolbar#master",
-    "core-icons": "Polymer/core-icons#master",
-    "core-icon-button": "Polymer/core-icon-button#master",
-    "core-header-panel": "Polymer/core-header-panel#master",
-    "context-free-parser": "Polymer/context-free-parser#master",
-    "marked-element": "PolymerLabs/marked-element#master",
-    "highlightjs-element": "PolymerLabs/highlightjs-element#master"
+    "core-ajax": "Polymer/core-ajax#>=0.3.0 <1.0.0",
+    "core-layout": "Polymer/core-layout#>=0.3.0 <1.0.0",
+    "core-menu": "Polymer/core-menu#>=0.3.0 <1.0.0",
+    "core-item": "Polymer/core-item#>=0.3.0 <1.0.0",
+    "core-toolbar": "Polymer/core-toolbar#>=0.3.0 <1.0.0",
+    "core-icons": "Polymer/core-icons#>=0.3.0 <1.0.0",
+    "core-icon-button": "Polymer/core-icon-button#>=0.3.0 <1.0.0",
+    "core-header-panel": "Polymer/core-header-panel#>=0.3.0 <1.0.0",
+    "context-free-parser": "Polymer/context-free-parser#>=0.3.0 <1.0.0",
+    "marked-element": "PolymerLabs/marked-element#>=0.3.0 <1.0.0",
+    "highlightjs-element": "PolymerLabs/highlightjs-element#>=0.3.0 <1.0.0"
   }
-}
+}
\ No newline at end of file