diff --git a/bbgo/kline.go b/bbgo/kline.go
index cc7fc4766..2864c85f9 100644
--- a/bbgo/kline.go
+++ b/bbgo/kline.go
@@ -28,7 +28,7 @@ type KLine struct {
 	QuoteVolume string `json:"Q"` // taker buy quote asset volume (like 1000USDT)
 
 	LastTradeID    int  `json:"L"`
-	NumberOfTrades int  `json:"n"`
+	NumberOfTrades int64  `json:"n"`
 	Closed         bool `json:"x"`
 }