diff --git a/auth/v1/msg.proto b/auth/v1/msg.proto
index da146b2..4957773 100644
--- a/auth/v1/msg.proto
+++ b/auth/v1/msg.proto
@@ -157,8 +157,8 @@ message Identity {
   optional string employee_info = 23;
   string pub_key = 24;
   optional float balance = 25;
-  string postal_code = 26;
-  string user_address = 27;
+  optional string postal_code = 26;
+  optional string user_address = 27;
 }
 
 message IdentityBasic {