diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e58a9bd218bca08c4eec5fc03d583865de068438..7fc58a83d2a176418217a8a3f99dfbef5ea1379f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: ruby:2.4
+image: ruby:2.5
 
 variables:
   JEKYLL_ENV: production