diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index a296f37..c159a1d 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -17,29 +17,11 @@ jobs:
     steps:
       - name: Change Download URL
         run: |
-          cat <<'EOF' > /etc/apt/sources.list
-          # 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
-          deb https://mirror.nju.edu.cn/ubuntu/ noble main restricted universe multiverse
-          # deb-src https://mirror.nju.edu.cn/ubuntu/ noble main restricted universe multiverse
-          deb https://mirror.nju.edu.cn/ubuntu/ noble-updates main restricted universe multiverse
-          # deb-src https://mirror.nju.edu.cn/ubuntu/ noble-updates main restricted universe multiverse
-          deb https://mirror.nju.edu.cn/ubuntu/ noble-backports main restricted universe multiverse
-          # deb-src https://mirror.nju.edu.cn/ubuntu/ noble-backports main restricted universe multiverse
-  
-          # 以下安全更新软件源包含了官方源与镜像站配置，如有需要可自行修改注释切换
-          # deb https://mirror.nju.edu.cn/ubuntu/ noble-security main restricted universe multiverse
-          # # deb-src https://mirror.nju.edu.cn/ubuntu/ noble-security main restricted universe multiverse
-  
-          deb http://security.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse
-          # deb-src http://security.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse
-  
-          # 预发布软件源，不建议启用
-          # deb https://mirror.nju.edu.cn/ubuntu/ noble-proposed main restricted universe multiverse
-          # # deb-src https://mirror.nju.edu.cn/ubuntu/ noble-proposed main restricted universe multiverse
-          EOF
-          
-          apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C
-
+          # 替换为 NJU 的 APT 源
+          echo "deb https://mirror.nju.edu.cn/ubuntu/ noble main restricted universe multiverse" > /etc/apt/sources.list
+          echo "deb https://mirror.nju.edu.cn/ubuntu/ noble-updates main restricted universe multiverse" >> /etc/apt/sources.list
+          echo "deb https://mirror.nju.edu.cn/ubuntu/ noble-backports main restricted universe multiverse" >> /etc/apt/sources.list
+          echo "https://mirror.nju.edu.cn/ubuntu/ noble-security main restricted universe multiverse" >> /etc/apt/sources.list
 
       - name: Apt Update
         run: |