diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e0927c5295bf34a3b776ecd7ba8d7dbeb345e491..c05f65459e4c44564b3e2bba2f9b116cc4d5f3eb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,7 +16,7 @@
 # This specific template is located at:
 # https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Getting-Started.gitlab-ci.yml
 
-image: debian:bullseye-slim
+image: sdvharbor.slub-dresden.de/replication/debian:bookworm-slim
 
 before_script:
   - apt-get update