diff --git a/.travis.yml b/.travis.yml
index a1607b8..e4d0222 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,13 +7,11 @@ node_js:
 - 6
 - 5
 - 4
-- '0.12'
-- '0.10'
 
 script:
 - npm run test-mocha
 - npm run test-phantomjs
-- if [[ "$TRAVIS_NODE_VERSION" != "0.1"* ]]; then npm run test-readme; fi
+- npm run test-readme
 - npm run check-style
 
 after_script:
diff --git a/appveyor.yml b/appveyor.yml
index 4e75825..bd457f4 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,8 +13,6 @@ environment:
   - nodejs_version: 6
   - nodejs_version: 5
   - nodejs_version: 4
-  - nodejs_version: '0.12'
-  - nodejs_version: '0.10'
 
 install:
   - ps: Install-Product node $env:nodejs_version
@@ -27,7 +25,7 @@ test_script:
   - npm --version
   - npm run test-mocha
   - npm run test-phantomjs
-  - if not "%nodejs_version:~0,3%" == "0.1" npm run test-readme
+  - npm run test-readme
   - npm run check-style
 
 # Don't actually build
diff --git a/package.json b/package.json
index 2c4d84b..28d77ac 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,9 @@
     "url": "https://jeremie.astori.fr"
   },
   "license": "MIT",
+  "engines": {
+    "node": ">=4"
+  },
   "bugs": {
     "url": "https://github.com/astorije/chai-immutable/issues"
   },