diff --git a/GenOnlineService/Constants.cs b/GenOnlineService/Constants.cs
index 6c18add..03df735 100644
--- a/GenOnlineService/Constants.cs
+++ b/GenOnlineService/Constants.cs
@@ -1211,7 +1211,11 @@ public async Task SendAsync(byte[] buffer, WebSocketMessageType messageType, Can
 					{
 						try
 						{
-							cts.Dispose();
+							// Disarm the pending CancelAfter timer before disposing to prevent a race condition
+						// where the timer fires concurrently with Dispose(), causing ObjectDisposedException
+						// in CancellationTokenSource.ExecuteCallbackHandlers.
+						cts.CancelAfter(Timeout.InfiniteTimeSpan);
+						cts.Dispose();
 						}
 						catch (ObjectDisposedException)
 						{