diff --git a/install.sh b/install.sh
index 34cdb3c..f662fac 100644
--- a/install.sh
+++ b/install.sh
@@ -828,7 +828,8 @@ handleNginx() {
 installCronTLS() {
 	echoContent skyBlue "\n进度 $1/${totalProgress} : 添加定时维护证书"
 	crontab -l >/etc/v2ray-agent/backup_crontab.cron
-	sed '/v2ray-agent/d;/acme.sh/d' /etc/v2ray-agent/backup_crontab.cron >/etc/v2ray-agent/backup_crontab.cron
+	local historyCrontab=$(sed '/v2ray-agent/d;/acme.sh/d' /etc/v2ray-agent/backup_crontab.cron)
+	echo "${historyCrontab}" >/etc/v2ray-agent/backup_crontab.cron
 	echo "30 1 * * * /bin/bash /etc/v2ray-agent/install.sh RenewTLS >> /etc/v2ray-agent/crontab_tls.log 2>&1" >>/etc/v2ray-agent/backup_crontab.cron
 	crontab /etc/v2ray-agent/backup_crontab.cron
 	echoContent green "\n ---> 添加定时维护证书成功"
@@ -3779,7 +3780,7 @@ menu() {
 	cd "$HOME" || exit
 	echoContent red "\n=============================================================="
 	echoContent green "作者：mack-a"
-	echoContent green "当前版本：v2.4.39"
+	echoContent green "当前版本：v2.4.40"
 	echoContent green "Github：https://github.com/mack-a/v2ray-agent"
 	echoContent green "描述：八合一共存脚本\c"
 	showInstallStatus