diff --git a/proto/ss/member/identity.proto b/proto/ss/member/identity.proto
index 3ac79c4..7342033 100644
--- a/proto/ss/member/identity.proto
+++ b/proto/ss/member/identity.proto
@@ -51,5 +51,5 @@ message SigninRequest {
 
 message SigninResponse {
   optional bet.protobuf.rpc.Error error = 1;
-  optional string token = 2;
+  optional string session_id = 2;
 }