diff --git a/common/DOC.md b/common/DOC.md
index 97e6dbb0..6b898e23 100644
--- a/common/DOC.md
+++ b/common/DOC.md
@@ -339,6 +339,12 @@ type BaseSession struct {
 func (bs *BaseSession) Close() error
 ```
 
+#### func (*BaseSession) Conn
+
+```go
+func (bs *BaseSession) Conn() net.Conn
+```
+
 #### func (*BaseSession) From
 
 ```go