diff --git a/.travis.yml b/.travis.yml
index 1f0ac0a..2e56cdf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,9 +9,8 @@ branches:
 notifications:
   email: false
 node_js:
-  - '4'
-before_install:
-  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 0.21.3
+  - '6'
+before_install:  
   - npm i -g npm@^4
 before_script:
   - npm prune
diff --git a/package.json b/package.json
index 62b6f27..de9b675 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "sr:beta": "semantic-release pre && npm run publish-npm:beta && semantic-release post"
   },
   "engines": {
-    "node": ">=4.6.x"
+    "node": ">=6.9.x"
   },
   "license": "MIT",
   "publishConfig": {},