diff --git a/docs/changelog.md b/docs/changelog.md
index 4cff9d4e..206375c9 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,3 +1,9 @@
+#### 1.2.1
+
+* Fix missing default host in v2ray http transport`s request
+* Flush DNS cache for macOS when tun start/close
+* Fix tun's DNS hijacking compatibility with systemd-resolved
+
 #### 1.2.0
 
 * Fix bugs and update dependencies
diff --git a/docs/configuration/inbound/tun.md b/docs/configuration/inbound/tun.md
index faa685bc..095c3e9a 100644
--- a/docs/configuration/inbound/tun.md
+++ b/docs/configuration/inbound/tun.md
@@ -107,8 +107,7 @@ Enforce strict routing rules when `auto_route` is enabled:
 * Let unsupported network unreachable
 * Route all connections to tun
 
-It prevents address leaks and makes DNS hijacking work on Android and Linux with systemd-resolved, but your device will
-not be accessible by others.
+It prevents address leaks and makes DNS hijacking work on Android, but your device will not be accessible by others.
 
 *In Windows*:
 
diff --git a/docs/configuration/inbound/tun.zh.md b/docs/configuration/inbound/tun.zh.md
index 11bc9419..350c8d9a 100644
--- a/docs/configuration/inbound/tun.zh.md
+++ b/docs/configuration/inbound/tun.zh.md
@@ -107,7 +107,7 @@ tun 接口的 IPv6 前缀。
 * 让不支持的网络无法到达
 * 将所有连接路由到 tun
 
-它可以防止地址泄漏，并使 DNS 劫持在 Android 和使用 systemd-resolved 的 Linux 上工作，但你的设备将无法其他设备被访问。
+它可以防止地址泄漏，并使 DNS 劫持在 Android 上工作，但你的设备将无法其他设备被访问。
 
 *在 Windows 中*:
 
diff --git a/docs/faq/known-issues.md b/docs/faq/known-issues.md
index 2bb2eedc..ac6892e1 100644
--- a/docs/faq/known-issues.md
+++ b/docs/faq/known-issues.md
@@ -9,10 +9,6 @@ the public internet.
 
 `auto-route` cannot automatically hijack DNS requests when Android's `Private DNS` enabled or `strict_route` disabled.
 
-##### on Linux
-
-`auto-route` cannot automatically hijack DNS requests with `systemd-resolved` enabled and `strict_route` disabled.
-
 #### System proxy
 
 ##### on Linux
diff --git a/docs/faq/known-issues.zh.md b/docs/faq/known-issues.zh.md
index 929087a0..1d25e723 100644
--- a/docs/faq/known-issues.zh.md
+++ b/docs/faq/known-issues.zh.md
@@ -8,10 +8,6 @@
 
 `auto-route` 无法自动劫持 DNS 请求如果 `私人 DNS` 开启或 `strict_route` 禁用。
 
-##### Linux
-
-`auto-route` 无法自动劫持 DNS 请求如果 `systemd-resolved` 开启且 `strict_route` 禁用。
-
 #### 系统代理
 
 ##### Linux