diff --git a/.travis.yml b/.travis.yml
index d062a3d5d826..8a225067c908 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - 2.4.1
+  - 2.5.5
 
 script:
   - bundle exec jekyll build