diff --git a/src/ss/member_balance.rs b/src/ss/member_balance.rs
index d2ee186..bcad486 100644
--- a/src/ss/member_balance.rs
+++ b/src/ss/member_balance.rs
@@ -1,4 +1,5 @@
 const SUBJECT: &str = "bet.beteran.ss.member_balance";
+const EVENT_SUBJECT: &str = "bet.beteran.ss_event.member_balance";
 
 pub const SUBJECT_CREATE_MEMBER_BALANCE: &str =
   const_format::concatcp!(SUBJECT, ".CreateMemberBalance");
@@ -10,6 +11,9 @@ pub const SUBJECT_UPDATE_MEMBER_BALANCE: &str =
 pub const SUBJECT_DELETE_MEMBER_BALANCE: &str =
   const_format::concatcp!(SUBJECT, ".DeleteMemberBalance");
 
+pub const EVENT_SUBJECT_AFTER_UPDATE_MEMBER_BALANCE: &str =
+  const_format::concatcp!(EVENT_SUBJECT, ".AfterUpdateMemberBalance");
+
 /// subject = bet.beteran.ss.member_balance.CreateMemberBalance
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CreateMemberBalanceRequest {