diff --git a/README.md b/README.md
index 4732b0f..1e31110 100644
--- a/README.md
+++ b/README.md
@@ -173,7 +173,7 @@ func CreateDemoTestResponse() *DemoTestResponse {
 
 ```
 
-终端调试打开方式, 需要在系统环境变量上加入
+终端调试打开方式, 需要在系统环境变量上加入(三选一):
 ```
-DEBUG=sdk,signer
+DEBUG=sdk,signer,request
 ```
\ No newline at end of file