diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 706d722d7fd7285da516b8b34ffaf340c7afbeaa..02cf7e8ac331e0bb7dc2725c5f3c87a1f5dd0cfe 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,8 @@
 pages:
   stage: deploy
-  image: jekyll/jekyll
+  image: ruby:2.1
   script:
+  - gem install jekyll
   - jekyll build -d public
   artifacts:
     paths:
diff --git a/_config.yml b/_config.yml
index 85daa77146f3447eaa7b34d4e5993f057d5586b3..96eb87690938e592be5e5951025c904a3085c220 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,3 +1,3 @@
 name: Your New Jekyll Site
 markdown: redcarpet
-pygments: true
+highlighter: true