diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 5b353ce..1669034 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -99,7 +99,7 @@ jobs:
 
       - name: Sign container image
         if: github.event_name != 'pull_request' && env.IS_TEST_BUILD == 'false'
-        uses: sigstore/cosign-sign-action@v3
+        uses: sigstore/cosign-sign-action@v3.1.1
         with:
           # Bild-Referenz ohne Tag, da die Action den Digest oder Tag separat trennt
           image-repository: ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}