diff --git a/docs/ikev2-howto-zh.md b/docs/ikev2-howto-zh.md
index 84f4cdf..6587da3 100644
--- a/docs/ikev2-howto-zh.md
+++ b/docs/ikev2-howto-zh.md
@@ -389,7 +389,9 @@ To customize IKEv2 or client options, run this script without arguments.
 
 ## 手动在 VPN 服务器上配置 IKEv2
 
-除了使用 [辅助脚本](#使用辅助脚本) 之外，高级用户也可以手动配置 IKEv2。下面举例说明如何手动在 Libreswan 上配置 IKEv2。以下命令必须用 `root` 账户运行。
+除了使用 [辅助脚本](#使用辅助脚本) 之外，高级用户也可以手动配置 IKEv2。在继续之前，推荐 <a href="../README-zh.md#升级libreswan" target="_blank">升级 Libreswan</a> 到最新版本。
+
+下面举例说明如何手动在 Libreswan 上配置 IKEv2。以下命令必须用 `root` 账户运行。
 
 1. 获取 VPN 服务器的公共 IP 地址，将它保存到变量并检查。
 
diff --git a/docs/ikev2-howto.md b/docs/ikev2-howto.md
index 2fdbbc4..1208e16 100644
--- a/docs/ikev2-howto.md
+++ b/docs/ikev2-howto.md
@@ -389,7 +389,9 @@ In certain circumstances, you may need to revoke a previously generated VPN clie
 
 ## Manually set up IKEv2 on the VPN server
 
-As an alternative to using the [helper script](#using-helper-scripts), advanced users can manually set up IKEv2. The following example shows how to manually configure IKEv2 with Libreswan. Commands below must be run as `root`.
+As an alternative to using the [helper script](#using-helper-scripts), advanced users can manually set up IKEv2. Before continuing, it is recommended to <a href="../README.md#upgrade-libreswan" target="_blank">update Libreswan</a> to the latest version.
+
+The following example shows how to manually configure IKEv2 with Libreswan. Commands below must be run as `root`.
 
 1. Find the VPN server's public IP, save it to a variable and check.