diff --git a/.github/workflows/cd.edge.build.yml b/.github/workflows/cd.edge.build.yml
index 5d84464..f4f58ce 100644
--- a/.github/workflows/cd.edge.build.yml
+++ b/.github/workflows/cd.edge.build.yml
@@ -77,4 +77,4 @@ jobs:
         id: cosign
         run: |
           cosign version
-          cosign sign --yes ${{ env.REGISTRY }}/${{ env.IMAGE }}:${{ steps.build.outputs.digest }} --upload
+          cosign sign --yes ${{ env.REGISTRY }}/${{ env.IMAGE }}@${{ steps.build.outputs.digest }} --upload