diff --git a/package.json b/package.json
index c8d82cd..76250d8 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
         "angular-mocks": "^1.5.7",
         "grunt": "^1.0.1",
         "grunt-bump": "^0.8.0",
-        "grunt-contrib-uglify": "^2.0.0",
+        "grunt-contrib-uglify": "^5.0.0",
         "grunt-karma": "^2.0.0",
         "grunt-karma-coveralls": "^2.5.4",
         "jasmine-core": "2.4.1",