diff --git a/package.json b/package.json
index 9ef215c..72c8e37 100644
--- a/package.json
+++ b/package.json
@@ -7,10 +7,10 @@
   "repository": "stream-utils/promise-transform-streams",
   "dependencies": {
     "native-or-bluebird": "1",
-    "readable-stream": "1"
+    "readable-stream": "2.0.5"
   },
   "devDependencies": {
-    "bluebird": "2",
+    "bluebird": "3.1.1",
     "istanbul": "0",
     "mocha": "2",
     "stream-to-array": "2"