diff --git a/package.json b/package.json
index be25a36..ac102ec 100644
--- a/package.json
+++ b/package.json
@@ -10,8 +10,8 @@
     "native-or-bluebird": "1"
   },
   "devDependencies": {
-    "bluebird": "2",
-    "mocha": "0",
+    "bluebird": "3.1.1",
+    "mocha": "2.3.4",
     "istanbul": "0"
   },
   "bin": "./bin/nhash",