diff --git a/.travis.yml b/.travis.yml
index 225ead2..0550b48 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 
-node_js: "4"
+node_js: "6"
 
 before_script:
   - npm run setup
diff --git a/package.json b/package.json
index 0dafee0..7cc637b 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "run": "node -r source-map-support/register example/testBot.js"
   },
   "engines": {
-    "node": ">=4.8.7"
+    "node": ">=6.0.0"
   },
   "author": "CasperTech Ltd",
   "license": "MIT",