diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index 4ad5b50..980dbd2 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -179,6 +179,9 @@ jobs:
           TAGS="${{ steps.meta.outputs.tags }}"
           args=""
 
+          image=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{github.sha}}
+          image=${image,,}
+
           # Create tag arguments
           for tag in $TAGS; do
               args="$args -t $tag"
@@ -191,8 +194,8 @@ jobs:
           echo $args
 
           docker buildx imagetools create $args \
-          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{github.sha}}-amd64 \
-          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{github.sha}}-arm64
+          ${image}-amd64 \
+          ${image}-arm64
 
       # Sign the manifest
       - name: Sign the manifests