diff --git a/tomox/mongodb_encoding.go b/tomox/mongodb_encoding.go
index 9b979d1917d3..979795f207ff 100644
--- a/tomox/mongodb_encoding.go
+++ b/tomox/mongodb_encoding.go
@@ -3,7 +3,6 @@ package tomox
 import (
 	"fmt"
 	"strconv"
-	"strings"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -13,14 +12,14 @@ import (
 func (o *OrderItem) GetBSON() (interface{}, error) {
 	or := OrderItemBSON{
 		PairName:        o.PairName,
-		ExchangeAddress: strings.ToLower(o.ExchangeAddress.Hex()),
-		UserAddress:     strings.ToLower(o.UserAddress.Hex()),
-		BaseToken:       strings.ToLower(o.BaseToken.Hex()),
-		QuoteToken:      strings.ToLower(o.QuoteToken.Hex()),
+		ExchangeAddress: o.ExchangeAddress.Hex(),
+		UserAddress:     o.UserAddress.Hex(),
+		BaseToken:       o.BaseToken.Hex(),
+		QuoteToken:      o.QuoteToken.Hex(),
 		Status:          o.Status,
 		Side:            o.Side,
 		Type:            o.Type,
-		Hash:            strings.ToLower(o.Hash.Hex()),
+		Hash:            o.Hash.Hex(),
 		Quantity:        o.Quantity.String(),
 		Price:           o.Price.String(),
 		Nonce:           o.Nonce.String(),
diff --git a/tomox/trade.go b/tomox/trade.go
index 766ed65ae926..065c4330d7ea 100644
--- a/tomox/trade.go
+++ b/tomox/trade.go
@@ -83,8 +83,8 @@ func (t *Trade) GetBSON() (interface{}, error) {
 		TakerOrderHash: t.TakerOrderHash.Hex(),
 		MakerExchange:  strings.ToLower(t.MakerExchange.Hex()),
 		TakerExchange:  strings.ToLower(t.TakerExchange.Hex()),
-		Hash:           strings.ToLower(t.Hash.Hex()),
-		TxHash:         strings.ToLower(t.TxHash.Hex()),
+		Hash:           t.Hash.Hex(),
+		TxHash:         t.TxHash.Hex(),
 		CreatedAt:      t.CreatedAt,
 		UpdatedAt:      t.UpdatedAt,
 		PricePoint:     t.PricePoint.String(),