diff --git a/Dockerfile b/Dockerfile
index e4f0e17..fe8270d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,8 +2,8 @@ FROM centos:centos7.9.2009
 
 # 切换 CentOS 镜像源为腾讯云源，更新包列表并安装依赖
 RUN sed -e "s|^mirrorlist=|#mirrorlist=|g" \
-    -e "s|^#baseurl=http://mirror.centos.org/centos/\$releasever|baseurl=https://mirrors.tencent.com/centos-vault/\$releasever|g" \
-    -e "s|^#baseurl=http://mirror.centos.org/\$contentdir/\$releasever|baseurl=https://mirrors.tencent.com/centos-vault/\$releasever|g" \
+    -e "s|^#baseurl=http://mirror.centos.org/centos/\$releasever|baseurl=https://mirrors.tencent.com/centos-vault/7.9.2009|g" \
+    -e "s|^#baseurl=http://mirror.centos.org/\$contentdir/\$releasever|baseurl=https://mirrors.tencent.com/centos-vault/7.9.2009|g" \
     -i.bak \
     /etc/yum.repos.d/CentOS-*.repo \
     && yum clean all \