diff --git a/package.json b/package.json
index c783f47f..23897892 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "eslint": "^0.18.0",
     "jasmine-node": "^1.14.5",
     "jscs": "^1.11.3",
-    "uglify-js": "^2.4.19"
+    "uglify-js": "=2.4.17"
   },
   "engines": {
     "node": ">=0.4.0"