diff --git a/proto/cmp/services/notification/v2/notify.proto b/proto/cmp/services/notification/v2/notify.proto
index 8c5ccde..8b41ad1 100644
--- a/proto/cmp/services/notification/v2/notify.proto
+++ b/proto/cmp/services/notification/v2/notify.proto
@@ -42,7 +42,8 @@ message TokenBought {
 // ```
 message TokenExpired {
   uint64 token_id = 1;
-  cmp.types.v1.UUID mint_id = 2;
+  string tx_id = 2;
+  cmp.types.v1.UUID mint_id = 3;
 }
 
 // Related on-chain event: