diff --git a/.travis.yml b/.travis.yml
index 7b2bb6e..fdd1203 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,7 @@
 sudo: false
 language: node_js
 node_js:
-  - "iojs"
-  - "0.12"
+  - "4.0"
 
 # Make sure we have new NPM.
 before_install:
diff --git a/package.json b/package.json
index ee6c073..6c836e8 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "codestyle",
     "test"
   ],
+  "engines" : { "node" : "^4.0.0" },
   "devDependencies": {
     "code": "^1.4.1",
     "lab": "^5.13.0",