diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0ae5b86..149247e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,7 @@ image: ruby:2.3
 
 variables:
   JEKYLL_ENV: production
+  LC_ALL: C.UTF-8
 
 before_script:
   - bundle install