diff --git a/internal/storage/gift_mongo.go b/internal/storage/gift_mongo.go
index 34dc04b..764b5bd 100644
--- a/internal/storage/gift_mongo.go
+++ b/internal/storage/gift_mongo.go
@@ -55,6 +55,12 @@ func (r *MySQLRepository) listMongoGiftAmounts(ctx context.Context, db *mongo.Da
 			{Key: "_id", Value: bson.D{{Key: "userId", Value: "$userId"}, {Key: "day", Value: "$day"}}},
 			{Key: "amount", Value: bson.D{{Key: "$sum", Value: "$amount"}}},
 		}}},
+		bson.D{{Key: "$project", Value: bson.D{
+			{Key: "_id", Value: 0},
+			{Key: "userId", Value: "$_id.userId"},
+			{Key: "day", Value: "$_id.day"},
+			{Key: "amount", Value: "$amount"},
+		}}},
 	)
 	cursor, err := db.Collection(giftRunningWaterCollection).Aggregate(ctx, pipeline)
 	if err != nil {
@@ -67,9 +73,8 @@ func (r *MySQLRepository) listMongoGiftAmounts(ctx context.Context, db *mongo.Da
 		if err := cursor.Decode(&doc); err != nil {
 			return nil, err
 		}
-		idDoc, _ := doc["_id"].(bson.M)
-		userID := bsonInt64(idDoc["userId"])
-		day := strings.TrimSpace(fmt.Sprint(idDoc["day"]))
+		userID := bsonInt64(doc["userId"])
+		day := strings.TrimSpace(fmt.Sprint(doc["day"]))
 		amount := bsonDecimal(doc["amount"])
 		if userID == 0 || day == "" {
 			continue