diff --git a/Plugins/Flow.Launcher.Plugin.Folder/Main.cs b/Plugins/Flow.Launcher.Plugin.Folder/Main.cs
index d8ad5d748..4f6d26590 100644
--- a/Plugins/Flow.Launcher.Plugin.Folder/Main.cs
+++ b/Plugins/Flow.Launcher.Plugin.Folder/Main.cs
@@ -1,6 +1,6 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Windows;