diff --git a/MainWindow.axaml.cs b/MainWindow.axaml.cs
index a76b6a8..c6bb26a 100644
--- a/MainWindow.axaml.cs
+++ b/MainWindow.axaml.cs
@@ -90,6 +90,7 @@ public partial class MainWindow : Window
         });
 
         if (file == null) return;
+        if (file.Count == 0) return;
 
         var imported_students = import.ImportStudentsFromFile(file[0].Path.LocalPath.ToString());
         foreach (var s in imported_students)