diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 3ab2d2f..2f83aa6 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -3,7 +3,7 @@ jobs:
   job:
     runs-on: ubuntu-latest
     container:
-      image: debian:bookworm
+      image: ${{vars.DOCKER||'docker.io'}}/debian:bookworm
     steps:
     - name: spcd
       run: >
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:
   - >