diff --git a/Mirai.Net.Test/Program.cs b/Mirai.Net.Test/Program.cs
index 24b557d..9488143 100644
--- a/Mirai.Net.Test/Program.cs
+++ b/Mirai.Net.Test/Program.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Net.Http;
 using System.Reactive.Linq;
 using System.Threading;