diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index ac91525..7009bca 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -4,6 +4,7 @@ on: [push]
 
 jobs:
   flutter:
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: subosito/flutter-action@v2