diff --git a/js/package.json b/js/package.json
index 75aece6..a0f5fda 100644
--- a/js/package.json
+++ b/js/package.json
@@ -22,7 +22,7 @@
     "grunt-contrib-jshint": "*",
     "jshint-stylish": "^2.1.0",
     "grunt-concurrent": "~1.0.0",
-    "grunt-contrib-concat": "~0.1.2",
+    "grunt-contrib-concat": "~2.1.0",
     "grunt-contrib-less": "~0.6.4",
     "grunt-contrib-watch": "~0.2.0",
     "grunt-newer": "~1.1.1",