diff --git a/.gitlab/ci/docker.images.yml b/.gitlab/ci/docker.images.yml
index f19f3df..bd53b28 100644
--- a/.gitlab/ci/docker.images.yml
+++ b/.gitlab/ci/docker.images.yml
@@ -13,5 +13,5 @@ docker:
     - .docker
   parallel:
     matrix:
-      - OS: ['debian:bullseye', 'debian:bullseye-slim']
+      - OS: ['debian:bookworm', 'debian:bookworm-slim']
         DOCKER: ['23.0.6', '24.0.5']