diff --git a/.travis.yml b/.travis.yml
index 31c7703..02cfeeb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,6 @@ node_js:
 - node
 - lts/*
 - '6'
-- '4'
 install: npm install
 before_install:
 - if [[ `npm -v` = 2* ]]; then npm i -g npm@3; fi
diff --git a/package.json b/package.json
index e3fd201..3d89d30 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "url": "https://github.com/stryker-mutator/stryker-jest-runner.git"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "keywords": [
     "stryker",