diff --git a/README.md b/README.md
index 5f413d9b..9475cdc6 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@
 
 OpenAPI文档: https://github.com/QingdaoU/OnlineJudgeOpenAPI
 
-Demo: https://qduoj.com
+Demo: https://qduoj.virusdefender.net （https://qduoj.com 因为备案原因暂时无法访问）
 
 License: The Star And Thank Author License