minor tweaks to C# qpswoker
diff --git a/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs b/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
index e8be775..d401fa8 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
@@ -65,7 +65,7 @@
             var server = new Server
             {
                 Services = { BenchmarkService.BindService(new BenchmarkServiceImpl(responseSize)) },
-                Ports = { new ServerPort(config.Host, config.Port, credentials) }
+                Ports = { new ServerPort("[::]", config.Port, credentials) }
             };
 
             server.Start();