diff --git a/package.json b/package.json
index b8c907a..8cf8cb0 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "jsonwebtoken": "8.3.0"
   },
   "devDependencies": {
-    "grunt": "1.4.0",
+    "grunt": "1.5.3",
     "grunt-eslint": "23.0.0"
   },
   "scripts": {