diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index f82e6df..be14538 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -17,7 +17,6 @@ jobs:
           echo "deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free">/etc/apt/sources.list
           echo "deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free">>/etc/apt/sources.list
           echo "deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free">>/etc/apt/sources.list
-          echo "deb https://security.debian.org/debian-security bullseye-security main contrib non-free">>/etc/apt/sources.list
           cat /etc/apt/sources.list
           rm -rf /etc/apt/sources.list.d/*
           echo "--- update source ---"