diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index a42c392..9bbfc04 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -31,6 +31,7 @@ jobs:
         shell: bash
         run: |
           echo "${{ secrets.RUNNER_SSH_PRIVATE_KEY  }}" > ~/.ssh/id_ed25519
+          chmod 440 ~/.ssh/id_ed25519
           echo "{{ secrets.INSTANCE_SSH_PUBLIC_KEY   }} > ~/.ssh/known_hosts"
       - name: git lfs pull
         shell: bash