diff --git a/package.json b/package.json
index dc6a512..985525e 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "gzip-size-cli": "^2.0.0",
     "mocha": "^3.4.2",
     "nyc": "^11.0.3",
-    "uglify-js": "^3.0.23",
+    "uglify-js": "^3.3.22",
     "universal-url": "^1.0.0"
   },
   "engines": {