diff --git a/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs b/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
index f0635e4..7e44e2e 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
@@ -1,6 +1,5 @@
 using System;
 using System.ComponentModel;
-using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using FontAwesome.WPF;