diff --git a/.travis.yml b/.travis.yml
index f2f59ed0..9fc6377f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - "2.4.1"
+  - "2.5.8"
 cache: bundler
 env:
   # http://docs.travis-ci.com/user/environment-variables/#Global-Variables