diff --git a/sources.list b/sources.list
index 9586768..1200766 100644
--- a/sources.list
+++ b/sources.list
@@ -1,10 +1,10 @@
-deb http://mirrors.aliyun.com/ubuntu/ bionic main reStricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-security main reStricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main reStricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main reStricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-BACkports main reStricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic main reStricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main reStricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main reStricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main reStricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-BACkports main reStricted universe multiverse
\ No newline at end of file
+deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse