diff --git a/.gitea/workflows/flake-update.yaml b/.gitea/workflows/flake-update.yaml
index e109afb..6242f5b 100644
--- a/.gitea/workflows/flake-update.yaml
+++ b/.gitea/workflows/flake-update.yaml
@@ -14,8 +14,11 @@ jobs:
       - name: "install nix"
         uses: cachix/install-nix-action@v31
 
-      - name: "setup git user"
-        uses: fregante/setup-git-user@v2
+      - uses: photostructure/git-ssh-signing-action@v1
+        with:
+          ssh-signing-key: ${{ secrets.SSH_SIGNING_KEY }}
+          git-user-name: ${{ vars.GIT_USER_NAME }}
+          git-user-email: ${{ vars.GIT_USER_EMAIL }}
 
       - name: "update flake.lock"
         run: |