diff --git a/Dockerfile b/Dockerfile
index ef96e83..4fc49a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,9 @@ FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 # 配置 apt-get 使用 apt-cacher-ng 作为代理
 RUN echo 'Acquire::http::Proxy "http://192.168.1.140:3142";' > /etc/apt/apt.conf.d/01proxy
 
+# 清除所有现有源
+RUN rm -rf /etc/apt/sources.list /etc/apt/sources.list.d/*
+
 # 配置阿里云镜像源
 RUN echo "deb http://mirrors.aliyun.com/debian/ bookworm main contrib non-free" > /etc/apt/sources.list && \
     echo "deb http://mirrors.aliyun.com/debian/ bookworm-updates main contrib non-free" >> /etc/apt/sources.list && \