diff --git a/package.json b/package.json
index 90b18ed..9d1ffa1 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "blanket": "1.2.3",
     "chai": "3.5.0",
     "chai-as-promised": "5.3.0",
-    "grunt": "0.4.5",
+    "grunt": "1.5.3",
     "grunt-cli": "^1.3.2",
     "grunt-contrib-clean": "1.0.0",
     "grunt-contrib-concat": "1.0.1",