diff --git a/linux/my_application.cc b/linux/my_application.cc
index 756679d3..3452446b 100644
--- a/linux/my_application.cc
+++ b/linux/my_application.cc
@@ -47,7 +47,9 @@ static void my_application_activate(GApplication* application) {
     gtk_window_set_title(window, "Yubico Authenticator");
   }
 
-  gtk_window_set_default_size(window, 400, 720);
+  gtk_window_set_default_size(window, 320, 720);
+  // Sets the minimum window size, should match desktop/window_manager_helper/defaults.dart
+  gtk_widget_set_size_request(GTK_WIDGET(window), 300, 0);
   gtk_widget_realize(GTK_WIDGET(window));
 
   g_autoptr(FlDartProject) project = fl_dart_project_new();