diff --git a/Dockerfile b/Dockerfile
index cbf0570..e2b5c92 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,8 +2,7 @@
 FROM python:3.10-slim
 
 # 替换为阿里云源
-RUN mv /etc/apt/sources.list /etc/apt/sources.list.bak && \
-    echo "deb https://mirrors.aliyun.com/debian/ bullseye main non-free contrib" > /etc/apt/sources.list && \
+RUN echo "deb https://mirrors.aliyun.com/debian/ bullseye main non-free contrib" > /etc/apt/sources.list && \
     echo "deb https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib" >> /etc/apt/sources.list && \
     echo "deb https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib" >> /etc/apt/sources.list && \
     echo "deb https://mirrors.aliyun.com/debian-security bullseye-security main non-free contrib" >> /etc/apt/sources.list