diff --git a/package.json b/package.json
index 9de0c7c..945f01f 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "ms": "0"
   },
   "devDependencies": {
-    "bluebird": "2",
+    "bluebird": "3.1.1",
     "istanbul": "0",
     "mocha": "2",
     "mongodb": "2"