diff --git a/.gitea/workflows/deploy-dev.yml b/.gitea/workflows/deploy-dev.yml
index 99dd891..aa6c8c9 100644
--- a/.gitea/workflows/deploy-dev.yml
+++ b/.gitea/workflows/deploy-dev.yml
@@ -19,17 +19,12 @@ jobs:
 
       - name: Replace Debian APT sources
         run: |
-          tee /etc/apt/sources.list <<EOF
-          # 清华大学 Debian 11 Bullseye 镜像
-          deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
-          deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
-          deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
-          deb https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
-          EOF
+          sed -i 's/deb.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list \
+          && sed -i 's/security.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list
 
       - name: Install SSH tools
         run: |
-          apt-get install -y openssh-client rsync
+          apt-get update && apt-get install -y openssh-client rsync
 
       - name: Configure SSH
         env: