diff --git a/bucket_encryption_test.go b/bucket_encryption_test.go
index 64be1e1..f1dd306 100644
--- a/bucket_encryption_test.go
+++ b/bucket_encryption_test.go
@@ -21,9 +21,9 @@ func TestBucketService_GetEncryption(t *testing.T) {
 		testFormValues(t, r, vs)
 		fmt.Fprint(w, `<ServerSideEncryptionConfiguration>
     <Rule>
-        <ApplySideEncryptionConfiguration>
+        <ApplyServerSideEncryptionByDefault>
             <SSEAlgorithm>AES256</SSEAlgorithm>
-        </ApplySideEncryptionConfiguration>
+        </ApplyServerSideEncryptionByDefault>
     </Rule>
 </ServerSideEncryptionConfiguration>`)
 
diff --git a/cos.go b/cos.go
index 665084f..42ca376 100644
--- a/cos.go
+++ b/cos.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// Version current go sdk version
-	Version               = "0.7.10"
+	Version               = "0.7.11"
 	userAgent             = "cos-go-sdk-v5/" + Version
 	contentTypeXML        = "application/xml"
 	defaultServiceBaseURL = "http://service.cos.myqcloud.com"
diff --git a/object.go b/object.go
index 60864df..f7e5fbb 100644
--- a/object.go
+++ b/object.go
@@ -284,6 +284,7 @@ type ObjectDeleteOptions struct {
 	XCosSSECustomerKeyMD5 string `header:"x-cos-server-side-encryption-customer-key-MD5,omitempty" url:"-" xml:"-"`
 	//兼容其他自定义头部
 	XOptionHeader *http.Header `header:"-,omitempty" url:"-" xml:"-"`
+	VersionId     string       `header:"-" url:"VersionId,omitempty" xml:"-"`
 }
 
 // Delete Object请求可以将一个文件（Object）删除。
@@ -304,6 +305,7 @@ func (s *ObjectService) Delete(ctx context.Context, name string, opt ...*ObjectD
 		uri:       "/" + encodeURIComponent(name),
 		method:    http.MethodDelete,
 		optHeader: optHeader,
+		optQuery:  optHeader,
 	}
 	resp, err := s.client.send(ctx, &sendOpt)
 	return resp, err
@@ -440,9 +442,10 @@ type ObjectDeleteMultiResult struct {
 	XMLName        xml.Name `xml:"DeleteResult"`
 	DeletedObjects []Object `xml:"Deleted,omitempty"`
 	Errors         []struct {
-		Key     string
-		Code    string
-		Message string
+		Key       string `xml:",omitempty"`
+		Code      string `xml:",omitempty"`
+		Message   string `xml:",omitempty"`
+		VersionId string `xml:",omitempty"`
 	} `xml:"Error,omitempty"`
 }
 
@@ -472,6 +475,7 @@ type Object struct {
 	LastModified string `xml:",omitempty"`
 	StorageClass string `xml:",omitempty"`
 	Owner        *Owner `xml:",omitempty"`
+	VersionId    string `xml:",omitempty"`
 }
 
 // MultiUploadOptions is the option of the multiupload,