diff --git a/tool/helper.go b/tool/helper.go
index 2b5935d..2015e6a 100644
--- a/tool/helper.go
+++ b/tool/helper.go
@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"github.com/spf13/cast"
 	"io"
 	"math"
 	"math/rand"
@@ -43,7 +44,7 @@ func ByteFmt(size int64) string {
 	if frac > 0 {
 		return fmt.Sprintf("%.1f%s", math.Floor(val*10)/10, unitArr[p])
 	} else {
-		return fmt.Sprintf("%d%s", int(val), unitArr[p])
+		return fmt.Sprintf("%d%s", cast.ToInt(val), unitArr[p])
 	}
 }