diff --git a/README.md b/README.md
index 741e6a6..7d10e7f 100644
--- a/README.md
+++ b/README.md
@@ -153,7 +153,7 @@ Enjoy your very own VPN! :sparkles::tada::rocket::sparkles:
 
 **Android 6 and 7 users**: If you encounter connection issues, try <a href="docs/clients.md#android-6-and-7" target="_blank">these steps</a>.
 
-The same VPN account can be used by your multiple devices. However, due to an IPsec/L2TP limitation, if you wish to connect multiple devices simultaneously from behind the same NAT (e.g. home router), you must use only <a href="docs/clients-xauth.md" target="_blank">IPsec/XAuth mode</a>.
+The same VPN account can be used by your multiple devices. However, due to an IPsec/L2TP limitation, if you wish to connect multiple devices simultaneously from behind the same NAT (e.g. home router), you must <a href="#upgrade-libreswan">upgrade libreswan</a> to version 3.26 or later.
 
 For servers with an external firewall (e.g. <a href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html" target="_blank">EC2</a>/<a href="https://cloud.google.com/vpc/docs/firewalls" target="_blank">GCE</a>), open UDP ports 500 and 4500 for the VPN. Aliyun users, see [#433](https://github.com/hwdsl2/setup-ipsec-vpn/issues/433).