diff --git a/.gitea/workflows/hello_world.yaml b/.gitea/workflows/hello_world.yaml
index 9a188bb..1a34d01 100644
--- a/.gitea/workflows/hello_world.yaml
+++ b/.gitea/workflows/hello_world.yaml
@@ -17,7 +17,7 @@ jobs:
         with:
           pin: ${{ secrets.HSM_USER_PIN }}
           files: .gitea/**
-          public_key: https://emil.lerch.org/serverpublic.pem
+          public_key: 'https://emil.lerch.org/serverpublic.pem'
       - name: list workflows
         if: always()
         run: ls ${{ github.workspace }}/.gitea/workflows/