diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 3bc3ae2..040d153 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -9,7 +9,6 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}-gateway
 
 jobs:
   build:
@@ -22,6 +21,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set image name (lowercase)
+        id: image
+        run: echo "name=${GITHUB_REPOSITORY_OWNER,,}/atauth-gateway" >> $GITHUB_OUTPUT
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -37,7 +40,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: ${{ env.REGISTRY }}/${{ steps.image.outputs.name }}
           tags: |
             type=ref,event=branch
             type=ref,event=pr
@@ -62,4 +65,4 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: anchore/sbom-action@v0
         with:
-          image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+          image: ${{ env.REGISTRY }}/${{ steps.image.outputs.name }}:latest