diff --git a/.travis.yml b/.travis.yml
index 04a696932..4f0a487e2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: node_js
 node_js:
   - "0.10"
   - "0.8"
+  - "4.0.0"
 
 notifications:
   irc: "irc.freenode.org#socket.io"
diff --git a/History.md b/History.md
index 094e410f0..6daafe59b 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,9 @@
 
+1.5.3 / 2015-09-09
+==================
+
+  * package: bump `ws` to fix node 4.0.0
+
 1.5.2 / 2015-07-09
 ==================
 
diff --git a/package.json b/package.json
index 7915c0709..8924f9a5e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "engine.io",
-  "version": "1.5.2",
+  "version": "1.5.3",
   "description": "The realtime engine behind Socket.IO. Provides the foundation of a bidirectional connection between client and server",
   "main": "./lib/engine.io",
   "author": "Guillermo Rauch <guillermo@learnboost.com>",
@@ -33,7 +33,7 @@
     "mocha": "1.12.0",
     "expect.js": "0.2.0",
     "superagent": "0.15.4",
-    "engine.io-client": "1.5.2",
+    "engine.io-client": "1.5.3",
     "s": "0.1.1"
   },
   "scripts": {