diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 00ef729..0ad2e71 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: debian:bookworm
+image: ${DOCKER:-docker.io}/debian:bookworm
 job:
   script:
   - >