diff --git a/package.json b/package.json
index 188331d..3fd7514 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "uglify-js": "^2.4.24"
   },
   "devDependencies": {
-    "bluebird": "3.1.1",
+    "bluebird": "3.3.3",
     "istanbul": "0",
     "mocha": "2",
     "rimraf": "^2.4.5"