diff --git a/.travis.yml b/.travis.yml
index a0c8b9f..794f650 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: node_js
 sudo: false
 node_js:
-- '4.0'
-- '9.0'
+- lts/boron
+- node
 after_script: bash <(curl -s https://codecov.io/bash)
 deploy:
   provider: releases
@@ -14,4 +14,3 @@ deploy:
     - "coleman-liau.min.js"
   on:
     tags: true
-    node: '9.0'