diff --git a/README-zh.md b/README-zh.md
index 5c0e3e1..c8e51eb 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -345,7 +345,7 @@ https://gitlab.com/hwdsl2/setup-ipsec-vpn/-/raw/master/extras/vpnupgrade.sh
 如果无法下载，打开 [vpnupgrade.sh](extras/vpnupgrade.sh)，然后点击右边的 `Raw` 按钮。按快捷键 `Ctrl/Cmd+A` 全选，`Ctrl/Cmd+C` 复制，然后粘贴到你喜欢的编辑器。
 </details>
 
-当前支持的 Libreswan 最新版本是 `4.14`。查看已安装版本：`ipsec --version`。
+当前支持的 Libreswan 最新版本是 `4.15`。查看已安装版本：`ipsec --version`。
 
 **注：** `xl2tpd` 可以使用系统的软件包管理器进行更新，例如 Ubuntu/Debian 上的 `apt-get`。
 
diff --git a/README.md b/README.md
index c3478dc..4cd3646 100644
--- a/README.md
+++ b/README.md
@@ -345,7 +345,7 @@ https://gitlab.com/hwdsl2/setup-ipsec-vpn/-/raw/master/extras/vpnupgrade.sh
 If you are unable to download, open [vpnupgrade.sh](extras/vpnupgrade.sh), then click the `Raw` button on the right. Press `Ctrl/Cmd+A` to select all, `Ctrl/Cmd+C` to copy, then paste into your favorite editor.
 </details>
 
-The latest supported Libreswan version is `4.14`. Check installed version: `ipsec --version`.
+The latest supported Libreswan version is `4.15`. Check installed version: `ipsec --version`.
 
 **Note:** `xl2tpd` can be updated using your system's package manager, such as `apt-get` on Ubuntu/Debian.