diff --git a/package.json b/package.json
index 1268492..4863014 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "coveralls": "^2.11.2",
     "gulp": "^3.8.11",
     "gulp-rename": "^1.2.0",
-    "gulp-uglify": "^1.1.0",
+    "gulp-uglify": "^2.1.1",
     "gulp-wrap": "^0.11.0",
     "istanbul": "^0.4.1",
     "mocha": "^2.2.1",