Index: .travis.yml
===================================================================
--- .travis.yml	(revision 10695)
+++ .travis.yml	(working copy)
@@ -63,8 +63,13 @@
     - mysql -e 'CREATE DATABASE wordpress_test;' -uroot
     # prepare for running the tests
     - cd $plugin_dir
+    - gem install scss_lint
+    # setup NodeJS version using NVM
+    - node --version
+    - nvm install 4
+    - node --version
     - npm install -g grunt-cli
-    - gem install scss_lint
+    - npm --version
 
 # before_script: Failures in this section will result in build status 'errored'
 before_script:
Index: package.json
===================================================================
--- package.json	(revision 10695)
+++ package.json	(working copy)
@@ -25,6 +25,9 @@
     "grunt-wp-i18n": "~0.5.3",
     "matchdep": "~1.0.0"
   },
+  "engines": {
+    "node": ">=4.2.1"
+  },
   "keywords": [
     "activity",
     "community",