diff --git a/src/main.rs b/src/main.rs
index 2487267..e73c1fe 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,8 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
-mod theme;
 mod app;
+mod theme;
 use app::App;
+use egui::ViewportBuilder;
 
 fn main() -> Result<(), eframe::Error> {
     // Log to stdout (if you run with `RUST_LOG=debug`).
@@ -9,8 +10,7 @@ fn main() -> Result<(), eframe::Error> {
 
     // Setup the options for the default window
     let options = eframe::NativeOptions {
-        initial_window_size: Some(egui::vec2(300.0, 200.0)),
-        resizable: true,
+        viewport: ViewportBuilder::default().with_inner_size(egui::vec2(300.0, 200.0)),
         ..Default::default()
     };
 
@@ -18,6 +18,6 @@ fn main() -> Result<(), eframe::Error> {
     eframe::run_native(
         "egui-template",
         options,
-        Box::new(|_cc| Box::new(App::default())),
+        Box::new(|_cc| Ok(Box::new(App::default()))),
     )
-}
\ No newline at end of file
+}