diff --git a/.github/workflows/docker-build-push.yaml b/.github/workflows/docker-build-push.yaml
index 16a86f1..3c3b717 100644
--- a/.github/workflows/docker-build-push.yaml
+++ b/.github/workflows/docker-build-push.yaml
@@ -17,6 +17,9 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Set lowercase repository name
+        run: echo "REPO_LOWERCASE=${GITHUB_REPOSITORY,,}" >> $GITHUB_ENV
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
 
@@ -33,5 +36,5 @@ jobs:
           context: ./build-base
           file: ./build-base/Dockerfile
           push: true
-          tags: ghcr.io/${{ github.repository_owner | lower }}/${{ github.event.repository.name | lower }}/base:latest
+          tags: ghcr.io/${{ env.REPO_LOWERCASE }}/base:latest
           platforms: linux/amd64,linux/arm64