diff --git a/dotnet/src/Microsoft.AutoGen/Microsoft.AutoGen.Runtime.Grpc/GrpcWorkerConnection.cs b/dotnet/src/Microsoft.AutoGen/Microsoft.AutoGen.Runtime.Grpc/GrpcWorkerConnection.cs
index c3bdce73d60f..e9c77d1ede92 100644
--- a/dotnet/src/Microsoft.AutoGen/Microsoft.AutoGen.Runtime.Grpc/GrpcWorkerConnection.cs
+++ b/dotnet/src/Microsoft.AutoGen/Microsoft.AutoGen.Runtime.Grpc/GrpcWorkerConnection.cs
@@ -95,7 +95,7 @@ public async Task RunReadPump()
         }
         finally
         {
-            _shutdownCancellationToken.Cancel();
+            await _shutdownCancellationToken.CancelAsync();
             _gateway.OnRemoveWorkerProcess(this);
         }
     }