diff --git a/install.sh b/install.sh
index 18134d1..80e87f5 100644
--- a/install.sh
+++ b/install.sh
@@ -242,8 +242,8 @@ function domain_check() {
     wg-quick down wgcf >/dev/null 2>&1
     print_ok "已关闭 wgcf-warp"
   fi
-  local_ipv4=$(curl -s4m8 https://ifconfig.co/)
-  local_ipv6=$(curl -s6m8 https://ifconfig.co/)
+  local_ipv4=$(curl -4 ip.sb)
+  local_ipv6=$(curl -6 ip.sb)
   if [[ -z ${local_ipv4} && -n ${local_ipv6} ]]; then
     # 纯IPv6 VPS，自动添加DNS64服务器以备acme.sh申请证书使用
     echo -e nameserver 2a01:4f8:c2c:123f::1 > /etc/resolv.conf