diff --git a/.gitea/workflows/deploy-dev.yml b/.gitea/workflows/deploy-dev.yml
index ae6d4f6..1b3cd5a 100644
--- a/.gitea/workflows/deploy-dev.yml
+++ b/.gitea/workflows/deploy-dev.yml
@@ -15,10 +15,19 @@ jobs:
           ref: dev
           # 拉取深度（节省时间与带宽）
           fetch-depth: 0  # 0 表示拉取完整的历史
+      - 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
 
       - 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: