diff --git a/package.json b/package.json
index 987aa02..bbcf460 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   "dependencies": {
     "lodash": "^4.17.4",
     "q": "^1.4.1",
-    "uglify-js": "^2.8.5"
+    "uglify-js": "^3.0.21"
   },
   "devDependencies": {
     "chai": "^3.2.0",