diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index cfb1fd1..adf6aa2 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -107,14 +107,14 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@v4.1.2
 
-      - name: Sign container image (OCI Referrers Mode)
+      - name: Sign container image (Force Legacy Tag Mode)
         if: github.event_name != 'pull_request' && env.IS_TEST_BUILD == 'false'
         run: |
           cosign sign -y \
             --key env://COSIGN_PRIVATE_KEY \
-            --registry-referrers-mode oci-1-1 \
+            --registry-referrers-mode legacy \
             "${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build_image.outputs.digest }}"
         env:
-          COSIGN_EXPERIMENTAL: true
+          COSIGN_EXPERIMENTAL: false
           COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
           COSIGN_PASSWORD: ""