diff --git a/cos.go b/cos.go
index 8a9e820..e42806c 100644
--- a/cos.go
+++ b/cos.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// Version current go sdk version
-	Version               = "0.7.31"
+	Version               = "0.7.32"
 	userAgent             = "cos-go-sdk-v5/" + Version
 	contentTypeXML        = "application/xml"
 	defaultServiceBaseURL = "http://service.cos.myqcloud.com"
diff --git a/object.go b/object.go
index 6e7d9f5..0177b83 100644
--- a/object.go
+++ b/object.go
@@ -122,7 +122,7 @@ type PresignedURLOptions struct {
 func (s *ObjectService) GetPresignedURL(ctx context.Context, httpMethod, name, ak, sk string, expired time.Duration, opt interface{}) (*url.URL, error) {
 	sendOpt := sendOptions{
 		baseURL:   s.client.BaseURL.BucketURL,
-		uri:       "/" + encodeURIComponent(name),
+		uri:       "/" + encodeURIComponent(name, []byte{'/'}),
 		method:    httpMethod,
 		optQuery:  opt,
 		optHeader: opt,