diff --git a/package.json b/package.json
index 24cf627..c9e1034 100644
--- a/package.json
+++ b/package.json
@@ -20,10 +20,10 @@
   ],
   "devDependencies": {
     "finalhandler": "0.2.x",
-    "grunt": "~0.4.5",
+    "grunt": "~1.6.1",
     "grunt-contrib-uglify": "~0.5.0",
     "phantomjs": "~1.9.x",
-    "serve-static": "1.6.x",
+    "serve-static": "1.16.x",
     "tap-spec": "^2.2.0",
     "tape": "^3.0.0"
   }