diff --git a/.travis.yml b/.travis.yml
index 90c63c30b..5d1d4ba5e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-- 2.4.2
+  - 2.5.0
 script:
   - make test
 cache: