diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index 5d5e18a..215c8f3 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -6,7 +6,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    default_image: ghcr.io/catthehacker/ubuntu:full-latest
+    container:
+      image: ghcr.io/catthehacker/ubuntu:full-latest
     steps:
       - name: checkout
         uses: actions/checkout@v4