diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 55704aae01..237c453dbc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,6 +3,7 @@ services:
   - mysql:latest
   - postgres
 before_script:
+  - apt-get install -qq locales
   - echo "LC_ALL=\"en_US.UTF-8\"" >> /etc/default/locale
   - locale-gen en_US.UTF-8
   - update-locale LANG=en_US.UTF-8