diff --git a/Shadowsocks.Net/TCPListener.cs b/Shadowsocks.Net/TCPListener.cs
index 04c78e40..f92c4c4b 100644
--- a/Shadowsocks.Net/TCPListener.cs
+++ b/Shadowsocks.Net/TCPListener.cs
@@ -68,6 +68,7 @@ namespace Shadowsocks.Net
                 // Create a TCP/IP socket.
                 _tcpSocket = new Socket(_localEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
                 _tcpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
+                _tcpSocket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, false);
 
                 // Bind the socket to the local endpoint and listen for incoming connections.
                 _tcpSocket.Bind(_localEndPoint);
diff --git a/Shadowsocks.Net/UDPListener.cs b/Shadowsocks.Net/UDPListener.cs
index f2030632..ff8f638e 100644
--- a/Shadowsocks.Net/UDPListener.cs
+++ b/Shadowsocks.Net/UDPListener.cs
@@ -63,6 +63,7 @@ namespace Shadowsocks.Net
             // Create a TCP/IP socket.
             _udpSocket = new Socket(_localEndPoint.AddressFamily, SocketType.Dgram, ProtocolType.Udp);
             _udpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
+            _udpSocket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, false);
 
             // Bind the socket to the local endpoint and listen for incoming connections.
             _udpSocket.Bind(_localEndPoint);