diff --git a/package.json b/package.json
index f62babf..03c9406 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,8 @@
     "karma-webpack": "1.7.0",
     "load-grunt-tasks": "3.4.1",
     "minimist": "1.2.0",
-    "phantomjs": "2.1.3",
+    "phantomjs-prebuilt": "2.1.6",
+    "sinon": "1.17.3",
     "webpack": "1.12.14",
     "webpack-dev-server": "1.14.1"
   },