Defensive end-of-line closed of dep intervals.

bower.json

@@ -19,7 +19,7 @@
   ],
   "dependencies": {
     "amber": ">0.18.1",
-    "amber-contrib-web": ">=0.4.0",
+    "amber-contrib-web": ">=0.4.0 <0.5.0",
     "jquery-ui": ">=1.9.2",
     "bootstrap": "^3.3.4",
     "codemirror": "^5.10.0",