diff --git a/package.json b/package.json
index 191f7f8d..b96425f8 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "grunt-contrib-concat": "^1.0.0",
     "grunt-contrib-copy": "~1.0.0",
     "grunt-contrib-jshint": "~1.0.0",
-    "grunt-contrib-less": "~1.3.0",
+    "grunt-contrib-less": "~1.4.0",
     "grunt-contrib-qunit": "~1.2.0",
     "grunt-contrib-uglify": "^2.0.0",
     "grunt-contrib-watch": "~1.0.0",
@@ -35,6 +35,6 @@
     "time-grunt": "~1.4.0"
   },
   "engines": {
-    "node": "^5.5.0"
+    "node": "^6.0.0"
   }
 }