diff --git a/package.json b/package.json
index 4a3b7c3..e1f0dfb 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "devDependencies": {
     "coveralls": "^3.0.2",
     "istanbul": "^0.4.5",
-    "uglify-js": "^3.4.9"
+    "uglify-js": "^3.7.7"
   },
   "repository": {
     "type": "git",