diff --git a/Updater/MainWindow.xaml.cs b/Updater/MainWindow.xaml.cs
index fc5a613..acb2b0c 100644
--- a/Updater/MainWindow.xaml.cs
+++ b/Updater/MainWindow.xaml.cs
@@ -30,6 +30,7 @@ public partial class MainWindow : Window
         public MainWindow()
         {
             InitializeComponent();
+            ServicePointManager.Expect100Continue = true;
             ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
             this.Loaded += MainWindow_LoadedAsync;
         }