diff --git a/tools/ubuntu.sh b/tools/ubuntu.sh
index 2d75ecc..1b0d33e 100755
--- a/tools/ubuntu.sh
+++ b/tools/ubuntu.sh
@@ -6,7 +6,8 @@ set_mirror()
 {
     MIRROR=${1:-"mirrors.tuna.tsinghua.edu.cn"}
     MIRROR=${MIRROR//\//\\\/}
-    sed -i "s/(archive|security).ubuntu.com/${MIRROR}/g" /etc/apt/sources.list
+    sed -i "s@http://.*archive.ubuntu.com@https://${MIRROR}@g" /etc/apt/sources.list
+    sed -i "s@http://.*security.ubuntu.com@https://${MIRROR}@g" /etc/apt/sources.list
 }
 
 apt_install()