diff --git a/cartridges/application.py b/cartridges/application.py
index 4689737..a7cf4fe 100644
--- a/cartridges/application.py
+++ b/cartridges/application.py
@@ -22,6 +22,11 @@ class Application(Adw.Application):
         ))
         self.set_accels_for_action("app.quit", ("<Control>q",))
 
+    @override
+    def do_startup(self):
+        Adw.Application.do_startup(self)
+        Adw.StyleManager.get_default().props.color_scheme = Adw.ColorScheme.PREFER_DARK
+
     @override
     def do_activate(self):
         window = self.props.active_window or Window(application=self)