diff --git a/OF DL.Core/Services/DownloadService.cs b/OF DL.Core/Services/DownloadService.cs
index 7ab1f07..8e6a00e 100644
--- a/OF DL.Core/Services/DownloadService.cs	
+++ b/OF DL.Core/Services/DownloadService.cs	
@@ -1,3 +1,4 @@
+using System.Diagnostics;
 using System.Globalization;
 using System.Security.Cryptography;
 using System.Text.RegularExpressions;