diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index 93ae952..c3f2e0e 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -10,6 +10,9 @@ jobs:
     steps:
       - name: 安装 Docker CLI
         run: |
+          # 替换 Debian 源为清华镜像，避免国内连 deb.debian.org 超时
+          sed -i 's|deb.debian.org|mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list /etc/apt/sources.list.d/*.list 2>/dev/null || true
+          sed -i 's|security.debian.org|mirrors.tuna.tsinghua.edu.cn/debian-security|g' /etc/apt/sources.list /etc/apt/sources.list.d/*.list 2>/dev/null || true
           apt-get update -qq
           apt-get install -y -qq docker.io