diff --git a/ui/src/main.rs b/ui/src/main.rs
index 6258148..c79d3f4 100644
--- a/ui/src/main.rs
+++ b/ui/src/main.rs
@@ -228,6 +228,7 @@ impl ChessApp {
                 egui::Vec2::new(resolution.0 as f32, resolution.1 as f32)
             ));
         }
+        ctx.send_viewport_cmd(egui::ViewportCommand::Fullscreen(self.fullscreen));
     }
     async fn network_handler(
         server_port: String,