diff --git a/package-lock.json b/package-lock.json
index aa67c38..164ea1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
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@@ -1627,6 +1631,18 @@
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+      "dev": true
+    },
     "to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
diff --git a/package.json b/package.json
index 46dd49b..e5c4455 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "debugger"
   ],
   "devDependencies": {
-    "grunt": "^1.4.0",
+    "grunt": "^1.5.3",
     "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-concat": "^1.0.1",
     "grunt-contrib-copy": "^1.0.0",