diff --git a/.travis.yml b/.travis.yml
index 3af5bf7..3864113 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,6 @@ language: node_js
 node_js:
   - node
   - 6
-  - 4
 before_script:
   - yarn add edition-node
   - yarn add starterkit-mustache-base
diff --git a/package.json b/package.json
index 27f7ca2..6160efe 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "patternlab-node-cli",
   "description": "Command-line interface (CLI) for the patternlab-node core.",
-  "version": "0.0.1-alpha.5",
+  "version": "0.0.1-alpha.6",
   "bin": {
     "patternlab": "bin/patternlab.js"
   },
@@ -54,6 +54,6 @@
   "bugs": "https://github.com/pattern-lab/patternlab-node-cli/issues",
   "license": "MIT",
   "engines": {
-    "node": ">=4.0"
+    "node": ">=6.0"
   }
 }