diff --git a/.travis.yml b/.travis.yml
index b5e67b9ec849075a7b657183a0839a1d6168f0af..781ab558e44b0439f25d3f707598349aa6c770b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 sudo: false
 node_js:
-  - "4.1"
+  - 6
 before_script:
   - npm install -g free-programming-books-lint
 script: fpb-lint .