diff --git a/common/ASC.Data.Storage/ChunkedUploader/CommonChunkedUploadSession.cs b/common/ASC.Data.Storage/ChunkedUploader/CommonChunkedUploadSession.cs
index c4b7c3305d..cec1aed370 100644
--- a/common/ASC.Data.Storage/ChunkedUploader/CommonChunkedUploadSession.cs
+++ b/common/ASC.Data.Storage/ChunkedUploader/CommonChunkedUploadSession.cs
@@ -28,7 +28,6 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using System.Runtime.Serialization.Formatters.Binary;
 using System.Text.Json;
 
 namespace ASC.Core.ChunkedUploader