diff --git a/server.js b/server.js
index b9cfd6b..9b08664 100644
--- a/server.js
+++ b/server.js
@@ -5,7 +5,7 @@ const Config = require('so.sysconfig')({
   commanderOptions: [
     // 命令行里可以接受的参数。将传给 config.js 里的 commander。每个参数的定义格式是 [参数名，参数键，描述]，后两者用于传给commander，取值后覆盖掉Config里的同名变量。
     ['protocol', '-P, --protocol <string>', 'Web Server protocol: http|https|httpall.'],
-    ['host', '-h, --host <string>', 'Host IP or domain name, default to localhost.'],
+    ['host', '-H, --host <string>', 'Host IP or domain name, default to localhost.'],
 
     ['port', '-p, --port <number>', 'HTTP port number.'],
     ['from', '-f, --from <string>', 'Seed list such as \'["http://ip_or_dn:port"]\' or "noseed" to disable seeding.'],