diff --git a/LICENSE.txt b/LICENSE.txt
index 46bfdcb4..4be89ce9 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -624,6 +624,7 @@ copy of the Program in return for a fee.
                      END OF TERMS AND CONDITIONS
 
 Copyright (C) 2015 clowwindy <clowwindy42@gmail.com>
+Copyright (C) 2020 Shadowsocks Project <https://shadowsocks.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/shadowsocks-csharp/Properties/AssemblyInfo.cs b/shadowsocks-csharp/Properties/AssemblyInfo.cs
index bbb3a28a..b140accf 100755
--- a/shadowsocks-csharp/Properties/AssemblyInfo.cs
+++ b/shadowsocks-csharp/Properties/AssemblyInfo.cs
@@ -11,7 +11,7 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyConfiguration("")]
 [assembly: AssemblyCompany("")]
 [assembly: AssemblyProduct("Shadowsocks")]
-[assembly: AssemblyCopyright("clowwindy & community 2019")]
+[assembly: AssemblyCopyright("clowwindy & community 2020")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]