diff --git a/package.json b/package.json
index f17b487..a9997c7 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "mz": "^2.0.0"
   },
   "devDependencies": {
-    "bluebird": "^3.1.1",
+    "bluebird": "^3.4.0",
     "rimraf": "^2.0.0",
     "istanbul": "^0.4.2",
     "mocha": "^2.0.0"