diff --git a/client/highway.go b/client/highway.go
index 6ce7ec80..90c92a2b 100644
--- a/client/highway.go
+++ b/client/highway.go
@@ -183,7 +183,7 @@ func (c *QQClient) highwayUploadFileMultiThreadingByBDH(path string, cmdId int32
 	length, _ := io.Copy(h, file)
 	fh := h.Sum(nil)
 	_, _ = file.Seek(0, io.SeekStart)
-	if stat.Size() < 1024*1024*3 {
+	if stat.Size() < 1024*1024*3 || threadCount < 2 {
 		return c.highwayUploadByBDH(file, length, cmdId, ticket, fh, ext, false)
 	}
 	type BlockMetaData struct {
diff --git a/client/image.go b/client/image.go
index bfa3102c..fce6383d 100644
--- a/client/image.go
+++ b/client/image.go
@@ -91,7 +91,7 @@ func (c *QQClient) UploadGroupImageByFile(groupCode int64, path string) (*messag
 			c.srvSsoAddrs = append(c.srvSsoAddrs, fmt.Sprintf("%v:%v", binary.UInt32ToIPV4Address(uint32(addr)), rsp.UploadPort[i]))
 		}
 	}
-	if _, err = c.highwayUploadFileMultiThreadingByBDH(path, 2, 4, rsp.UploadKey, EmptyBytes, false); err == nil {
+	if _, err = c.highwayUploadFileMultiThreadingByBDH(path, 2, 1, rsp.UploadKey, EmptyBytes, false); err == nil {
 		goto ok
 	}
 	return nil, errors.Wrap(err, "upload failed")