diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 82d4647ed7..c91474266c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,6 +3,7 @@ services:
   - mysql:latest
   - postgres
 before_script:
+  - export LANG=en_US.UTF-8
   - apt-get update -qq
   - apt-get install -qq python-dev python-pip gcc gnupg1 tesseract-ocr tesseract-ocr-deu ghostscript libjpeg-dev libpng-dev libtiff-dev poppler-utils libreoffice
 variables: