diff --git a/.github/workflows/build-image.yml b/.github/workflows/build-image.yml
index f6dbae8..b456c8c 100644
--- a/.github/workflows/build-image.yml
+++ b/.github/workflows/build-image.yml
@@ -19,7 +19,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v4
         with:
-          images: ghcr.io/$ENDPOINT
+          images: "ghcr.io/$ENDPOINT"
           tags: |
             type=ref,event=branch
             # set latest tag for default branch