diff --git a/market/v1/msg.proto b/market/v1/msg.proto
index 4807aee..1a07ce7 100644
--- a/market/v1/msg.proto
+++ b/market/v1/msg.proto
@@ -65,8 +65,8 @@ message NewMarketReq{
   double amount = 3;
   double unit_price = 4;
   MarketOrderSide side = 5;
-  auth.v1.TFA tfa = 6;
-  bool accepted_contract = 7;
+  optional auth.v1.TFA tfa = 6;
+  optional bool accepted_contract = 7;
 }
 
 enum MarketOrderSide {