diff --git a/dedupe b/dedupe
index c096070..4e25561 100755
--- a/dedupe
+++ b/dedupe
@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 
 const { argv } = require('yargs')
-  .usage('用法: ./$0 <source id> <target id> [options]')
+  .usage('用法: ./$0 <folder-id> [options]')
   .alias('u', 'update')
   .describe('u', '不使用本地缓存，强制从线上获取源文件夹信息')
   .alias('S', 'service_account')