diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8e49e4c7d0b286bae4eafc1b61bb77c4ca277d94..116193240e59aafd699ab2e287694a1339fe8e9e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,8 +18,8 @@ ruby2-3:
     paths:
       - log/test.log
 
-ruby2-4:
-  image: "ruby:2.4"
+ruby2-5:
+  image: "ruby:2.5"
   script:
     - bundle exec rake test
   artifacts: