diff --git a/websocket-sharp/PayloadData.cs b/websocket-sharp/PayloadData.cs
index a89cec56..39f212c7 100644
--- a/websocket-sharp/PayloadData.cs
+++ b/websocket-sharp/PayloadData.cs
@@ -29,7 +29,6 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Text;
 
 namespace WebSocketSharp
 {