diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index 984b709..3048c1c 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -41,7 +41,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@v3.8.2
+        uses: sigstore/cosign-installer@v4.0.0
         with:
           cosign-release: 'v2.2.2' # optional