diff --git a/.travis.yml b/.travis.yml
index 0500839..4564a35 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ node_js:
   - "1.8"
   - "2.0"
   - "2.1"
+  - "4.0"
+  - "4.1"
 sudo: false
 script: "npm run-script test-ci"
 after_script: "npm install coveralls@2.10.0 && cat ./coverage/lcov.info | coveralls"
diff --git a/appveyor.yml b/appveyor.yml
index 6a102c9..ceb487c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,6 +7,7 @@ environment:
     - nodejs_version: "1.8"
     - nodejs_version: "2.0"
     - nodejs_version: "2.1"
+    - nodejs_version: "4.0"
 install:
   - ps: Install-Product node $env:nodejs_version
   - npm install