diff --git a/.github/workflows/docker-publish-backend.yml b/.github/workflows/docker-publish-backend.yml
index 6bff0cff..b989c235 100644
--- a/.github/workflows/docker-publish-backend.yml
+++ b/.github/workflows/docker-publish-backend.yml
@@ -37,14 +37,6 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      # Install the cosign tool except on PR
-      # https://github.com/sigstore/cosign-installer
-      - name: Install cosign
-        if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@d6a3abf1bdea83574e28d40543793018b6035605
-        with:
-          cosign-release: "v1.7.1"
-
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
         uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf