diff --git a/.gitea/workflows/container-build.yaml b/.gitea/workflows/container-build.yaml
index 3d1d908..a6baebf 100644
--- a/.gitea/workflows/container-build.yaml
+++ b/.gitea/workflows/container-build.yaml
@@ -17,6 +17,6 @@ jobs:
       - name: Var envs
         run: export
       - name: Docker retag
-        run: docker tag ubuntu:latest $GITHUB_REPOSITORY:latest
+        run: docker tag ubuntu:latest $(echo "$GITHUB_REPOSITORY" | tr '[:upper:]' '[:lower:]'):latest
       - name: Docker push
         run: docker push $GITHUB_ACTION_REPOSITORY:latest