diff --git a/.github/workflows/docker-backend.yml b/.github/workflows/docker-backend.yml
index e5d6fac..eb6f585 100644
--- a/.github/workflows/docker-backend.yml
+++ b/.github/workflows/docker-backend.yml
@@ -51,7 +51,7 @@ jobs:
         with:
           context: .
           build-args:
-          - EXTRA_DEPS=gcsfs
+            EXTRA_DEPS: gcsfs
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}