diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index 45eb95a..faab6bd 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -11,6 +11,11 @@ jobs:
   process-python:
     runs-on: auto_judgement_py
     steps:
+      - name: Set up Node.js
+        uses: github.com/actions/setup-node@v4
+        with:
+          node-version: '22'
+
       - name: Checkout PR code
         uses: actions/checkout@v4
         with: