diff --git a/package.json b/package.json
index 3726cf7..76e308f 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "mz": "1"
   },
   "devDependencies": {
-    "bluebird": "2",
+    "bluebird": "3.1.2",
     "istanbul": "0",
     "mocha": "2"
   },