diff --git a/README.md b/README.md
index 58dddee..10890fb 100644
--- a/README.md
+++ b/README.md
@@ -19,54 +19,54 @@ TCP流转换为KCP+UDP流，:snowflake:[下载地址](https://github.com/xtaci/k
 <img src="kitty.jpg" style="width: 300px;"/>
 
 ### 使用の方法:lollipop:
-```bat
-D:\>client_windows_amd64.exe -h
+```bash
+$ ./client_darwin_amd64 -h
 NAME:
    kcptun - kcptun client
 
 USAGE:
-   client_windows_amd64.exe [global options] command [command options] [arguments...]
+   ./client_darwin_amd64 [global options] command [command options] [arguments...]
 
 VERSION:
-   20160517
+   20160521
 
 COMMANDS:
-   help, h      Shows a list of commands or help for one command
+   help, h	Shows a list of commands or help for one command
 
 GLOBAL OPTIONS:
    --localaddr, -l ":12948"	local listen address
    --remoteaddr, -r "vps:29900"	kcp server address
    --key "it's a secrect"	key for communcation, must be the same as kcptun server [$KCPTUN_KEY]
    --mode "fast"		mode for communication: fast2, fast, normal, default
-   --tuncrypt			enable tunnel encryption, adds extra secrecy for data transfer
    --mtu "1350"			set MTU of UDP packets, suggest 'tracepath' to discover path mtu
    --sndwnd "128"		set send window size(num of packets)
-   --rcvwnd "1024"		set receive window size(num of packets)
+   --rcvwnd "512"		set receive window size(num of packets)
+   --fec "4"			set FEC group size, must be the same as server
    --help, -h			show help
    --version, -v		print the version
 
-D:\>server_windows_amd64.exe -h
+$ ./server_darwin_amd64 -h
 NAME:
    kcptun - kcptun server
 
 USAGE:
-   server_windows_amd64.exe [global options] command [command options] [arguments...]
+   ./server_darwin_amd64 [global options] command [command options] [arguments...]
 
 VERSION:
-   20160517
+   20160521
 
 COMMANDS:
-   help, h      Shows a list of commands or help for one command
+   help, h	Shows a list of commands or help for one command
 
 GLOBAL OPTIONS:
    --listen, -l ":29900"		kcp server listen address
    --target, -t "127.0.0.1:12948"	target server address
    --key "it's a secrect"		key for communcation, must be the same as kcptun client [$KCPTUN_KEY]
    --mode "fast"			mode for communication: fast2, fast, normal, default
-   --tuncrypt				enable tunnel encryption, adds extra secrecy for data transfer
    --mtu "1350"				set MTU of UDP packets, suggest 'tracepath' to discover path mtu
    --sndwnd "1024"			set send window size(num of packets)
    --rcvwnd "1024"			set receive window size(num of packets)
+   --fec "4"				set FEC group size, must be the same as client
    --help, -h				show help
    --version, -v			print the version
 ```