diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index d4d0dcf..f7d281d 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -4,8 +4,7 @@ on:
   - pull_request
 jobs:
   build:
-    container:
-      image: focs.ji.sjtu.edu.cn:5000/gitea/runner-images:ubuntu-latest
+    runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
         uses: https://gitea.com/BoYanZh/checkout@focs