diff --git a/src/main.rs b/src/main.rs
index fc13dc2..a5e73fd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,8 @@ mod config;
 mod theme;
 mod ui;
 
+use gtk4::prelude::*;
+
 fn main() {
     let app = gtk4::Application::builder()
         .application_id("com.breadway.bos-settings")
diff --git a/src/theme.rs b/src/theme.rs
index ae850d0..6be4f51 100644
--- a/src/theme.rs
+++ b/src/theme.rs
@@ -1,4 +1,3 @@
-use gtk4::prelude::*;
 use gtk4::CssProvider;
 
 const CSS: &str = r#"
diff --git a/src/ui/views/hyprland.rs b/src/ui/views/hyprland.rs
index 49ac07e..fba4537 100644
--- a/src/ui/views/hyprland.rs
+++ b/src/ui/views/hyprland.rs
@@ -50,7 +50,7 @@ pub fn build() -> GBox {
         for mon in &monitors {
             let lbl = Label::new(Some(mon));
             lbl.set_xalign(0.0);
-            lbl.set_monospace(true);
+            lbl.add_css_class("monospace");
             vbox.append(&lbl);
         }
     }
diff --git a/src/ui/window.rs b/src/ui/window.rs
index 0088675..c07a231 100644
--- a/src/ui/window.rs
+++ b/src/ui/window.rs
@@ -1,5 +1,5 @@
 use gtk4::prelude::*;
-use gtk4::{Application, ApplicationWindow, Box as GBox, Orientation, Paned, Stack};
+use gtk4::{Application, ApplicationWindow, Orientation, Paned, Stack};
 
 use super::sidebar;
 use super::views;
@@ -12,7 +12,7 @@ pub fn build_ui(app: &Application) {
         .default_height(640)
         .build();
 
-    crate::theme::load(&window.display());
+    crate::theme::load(&WidgetExt::display(&window));
 
     let hpaned = Paned::new(Orientation::Horizontal);
     hpaned.set_position(190);