diff --git a/oem_application_dockerfile b/oem_application_dockerfile
index 52cd2b7..846ae8f 100644
--- a/oem_application_dockerfile
+++ b/oem_application_dockerfile
@@ -82,4 +82,5 @@ USER nobody
 
 ENV nginx_root_directory=/var/www/html/public \
     upload_max_filesize=10M \
-    date_timezone=Europe/Berlin
+    date_timezone=Europe/Berlin \
+    intl_default_locale=de_DE