diff --git a/.gitea/workflows/docker-publish.yml b/.gitea/workflows/docker-publish.yml
index 99c61a2..54d03e5 100644
--- a/.gitea/workflows/docker-publish.yml
+++ b/.gitea/workflows/docker-publish.yml
@@ -48,8 +48,8 @@ jobs:
           REPOSITORY: ${{ gitea.repository }}
         run: |
           set -euo pipefail
-          OWNER="${REPOSITORY%/*}"
-          REPO="${REPOSITORY#*/}"
+          OWNER="$(printf '%s' "${REPOSITORY%/*}" | tr '[:upper:]' '[:lower:]')"
+          REPO="$(printf '%s' "${REPOSITORY#*/}" | tr '[:upper:]' '[:lower:]')"
           echo "IMAGE_LATEST=git.f-40.com/${OWNER}/${REPO}:latest" >> "$GITHUB_ENV"
           echo "IMAGE_VERSIONED=git.f-40.com/${OWNER}/${REPO}:${OSC_VERSION}" >> "$GITHUB_ENV"