diff --git a/package.json b/package.json
index a97e54e..4044a9e 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "csso": "^3.5.0",
     "html-escaper": "^1.0.1",
     "htmlparser2": "^4.0.0",
-    "uglify-js": "^3.3.27"
+    "uglify-js": "^3.6.3"
   },
   "devDependencies": {
     "coveralls": "^3.0.1",