diff --git a/README.md b/README.md
index 9624fd1..50b0409 100644
--- a/README.md
+++ b/README.md
@@ -178,7 +178,8 @@ encryption. If you need a proxy, just use our proxy modes.
   "prometheus_listen": ":8080", // Prometheus HTTP metrics server listen address (at /metrics)
   "recv_window_conn": 15728640, // QUIC stream receive window
   "recv_window_client": 67108864, // QUIC connection receive window
-  "max_conn_client": 4096 // Max concurrent connections per client
+  "max_conn_client": 4096, // Max concurrent connections per client
+  "disable_mtu_discovery": false // Disable Path MTU Discovery (RFC 8899)
 }
 ```
 
@@ -300,7 +301,8 @@ hysteria_traffic_uplink_bytes_total{auth="aGFja2VyISE="} 37452
   "insecure": false, // Ignore all certificate errors 
   "ca": "my.ca", // Custom CA file
   "recv_window_conn": 15728640, // QUIC stream receive window
-  "recv_window": 67108864 // QUIC connection receive window
+  "recv_window": 67108864, // QUIC connection receive window
+  "disable_mtu_discovery": false // Disable Path MTU Discovery (RFC 8899)
 }
 ```
 
diff --git a/README.zh.md b/README.zh.md
index 62dc408..2aee716 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -164,7 +164,8 @@ Hysteria 是一个功能丰富的，专为恶劣网络环境进行优化的网
   "prometheus_listen": ":8080", // Prometheus 统计接口监听地址 (在 /metrics)
   "recv_window_conn": 15728640, // QUIC stream receive window
   "recv_window_client": 67108864, // QUIC connection receive window
-  "max_conn_client": 4096 // 单客户端最大活跃连接数
+  "max_conn_client": 4096, // 单客户端最大活跃连接数
+  "disable_mtu_discovery": false // 禁用 MTU 探测 (RFC 8899)
 }
 ```
 
@@ -285,7 +286,8 @@ hysteria_traffic_uplink_bytes_total{auth="aGFja2VyISE="} 37452
   "insecure": false, // 忽略一切证书错误 
   "ca": "my.ca", // 自定义 CA
   "recv_window_conn": 15728640, // QUIC stream receive window
-  "recv_window": 67108864 // QUIC connection receive window
+  "recv_window": 67108864, // QUIC connection receive window
+  "disable_mtu_discovery": false // 禁用 MTU 探测 (RFC 8899)
 }
 ```