diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b6693b8..8f1e4b4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,6 @@
 # This file is a template, and might need editing before it works on your project.
 # Full project: https://gitlab.com/pages/jekyll
-image: ruby:2.3
+image: ruby:2.4
 
 test:
   stage: test