diff --git a/AobaCore/Services/ThumbnailService.cs b/AobaCore/Services/ThumbnailService.cs
index 14620b2..f0e24bb 100644
--- a/AobaCore/Services/ThumbnailService.cs
+++ b/AobaCore/Services/ThumbnailService.cs
@@ -20,7 +20,6 @@ using SixLabors.ImageSharp.Processing;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.Drawing;
 using System.Linq;
 using System.Net.Http.Headers;
 using System.Text;