diff --git a/drivers/189/189.go b/drivers/189/189.go
index 68caaebb..388b93e0 100644
--- a/drivers/189/189.go
+++ b/drivers/189/189.go
@@ -16,7 +16,6 @@ import (
 	log "github.com/sirupsen/logrus"
 	"io"
 	"math"
-	mathRand "math/rand"
 	"net/http"
 	"path/filepath"
 	"regexp"
@@ -462,7 +461,7 @@ func (driver Cloud189) UploadRequest(uri string, form map[string]string, account
 	c := strconv.FormatInt(time.Now().UnixMilli(), 10)
 	r := Random("xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx")
 	l := Random("xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx")
-	l = l[0 : 16+int(16*mathRand.Float32())]
+	l = l[0 : 16+int(16*utils.Rand.Float32())]
 
 	e := qs(form)
 	data := AesEncrypt([]byte(e), []byte(l[0:16]))
diff --git a/drivers/189/util.go b/drivers/189/util.go
index c8732cff..129fb882 100644
--- a/drivers/189/util.go
+++ b/drivers/189/util.go
@@ -14,18 +14,17 @@ import (
 	"encoding/pem"
 	"fmt"
 	"github.com/Xhofe/alist/drivers/base"
+	"github.com/Xhofe/alist/utils"
 	"github.com/go-resty/resty/v2"
 	log "github.com/sirupsen/logrus"
-	mathRand "math/rand"
 	"net/url"
 	"regexp"
 	"strconv"
 	"strings"
-	"time"
 )
 
 func random() string {
-	return fmt.Sprintf("0.%17v", mathRand.New(mathRand.NewSource(time.Now().UnixNano())).Int63n(100000000000000000))
+	return fmt.Sprintf("0.%17v", utils.Rand.Int63n(100000000000000000))
 }
 
 func RsaEncode(origData []byte, j_rsakey string, hex bool) string {
@@ -169,7 +168,7 @@ func Random(v string) string {
 	reg := regexp.MustCompilePOSIX("[xy]")
 	data := reg.ReplaceAllFunc([]byte(v), func(msg []byte) []byte {
 		var i int64
-		t := int64(16 * mathRand.Float32())
+		t := int64(16 * utils.Rand.Float32())
 		if msg[0] == 120 {
 			i = t
 		} else {
diff --git a/utils/random.go b/utils/random.go
index 9fd9c7fe..0ac24226 100644
--- a/utils/random.go
+++ b/utils/random.go
@@ -3,13 +3,22 @@ package utils
 import (
 	"math/rand"
 	"strings"
+	"time"
 )
 
+var Rand *rand.Rand
+
+func init() {
+	s := rand.NewSource(time.Now().UnixNano())
+	Rand = rand.New(s)
+}
+
 func RandomStr(n int) string {
+
 	builder := strings.Builder{}
 	t := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
 	for i := 0; i < n; i++ {
-		r := rand.Intn(len(t))
+		r := Rand.Intn(len(t))
 		builder.WriteString(t[r : r+1])
 	}
 	return builder.String()