diff --git a/NativeWebSocket/Assets/WebSocket/WebSocket.cs b/NativeWebSocket/Assets/WebSocket/WebSocket.cs
index 503cf43..f842eb1 100644
--- a/NativeWebSocket/Assets/WebSocket/WebSocket.cs
+++ b/NativeWebSocket/Assets/WebSocket/WebSocket.cs
@@ -566,7 +566,7 @@ private async Task SendMessage(List<ArraySegment<byte>> queue, WebSocketMessageT
                 {
                     // Send the message synchronously.
                     var t = m_Socket.SendAsync(buffer, messageType, true, m_CancellationToken);
-                    t.Wait(m_CancellationToken);
+                    await Task.WhenAny(t, Task.Delay(TimeSpan.FromMilliseconds(-1), m_CancellationToken));
                 }
                 finally
                 {