diff --git a/OpenDirectoryDownloader/Helpers/FileSizeHelper.cs b/OpenDirectoryDownloader/Helpers/FileSizeHelper.cs
index d8b824ce..37f250de 100644
--- a/OpenDirectoryDownloader/Helpers/FileSizeHelper.cs
+++ b/OpenDirectoryDownloader/Helpers/FileSizeHelper.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Globalization;
 using System.Linq;
 using System.Text.RegularExpressions;