diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8df1f7d263e759a0f7bfedca491447862a9cd021..80d9d87d7b83779a494067c000408d57d7014032 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,8 @@
 image: registry.git.cccv.de/infra/static-pages/docker-images/buster-mkdocs
 
+variables:
+  GIT_SUBMODULE_STRATEGY: recursive
+
 pages:
   stage: deploy
   script: