diff --git a/errors/v1/msg.proto b/errors/v1/msg.proto
index 2f69a24..bb1f533 100644
--- a/errors/v1/msg.proto
+++ b/errors/v1/msg.proto
@@ -35,6 +35,8 @@ enum ErrCode {
   INVALID_ARGUMENT_BAD_STELLAR_ADDRESS = 2013;
   INVALID_ARGUMENT_ZERO_AMOUNT = 2014;
   INVALID_BUY_AMOUNT = 2015;
+  INVALID_BUY_AMOUNT_MAX = 2016;
+  INVALID_BUY_AMOUNT_MIN = 2017;
 
   // Resource errors
   NOT_FOUND = 3000;