diff --git a/package.json b/package.json
index 492c59bd786..fd609e0a0d6 100644
--- a/package.json
+++ b/package.json
@@ -104,7 +104,7 @@
     "rollup-plugin-node-resolve": "^2.0.0",
     "sinon": "^1.17.4",
     "sinon-chai": "^2.8.0",
-    "uglify-js": "^2.7.5",
+    "uglify-js": "^2.8.4",
     "webpack": "^1.13.1"
   },
   "greenkeeper": {