diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 4b1c47b..af5ad3b 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -21,6 +21,10 @@ jobs:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
+      - name: lowerify repository name
+        id: lowerify
+        run: |
+          echo "repository=$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
       - name: build and push
         uses: docker/bake-action@v3
         with:
@@ -32,4 +36,4 @@ jobs:
             server.cache-to=type=gha,mode=max
         env:
           TAG: ${{ steps.short-sha.outputs.tag }}
-          IMAGE_NAME: ghcr.io/${{ github.repository }}
+          IMAGE_NAME: ghcr.io/${{ steps.lowerify.outputs.repository }}