diff --git a/vanilla_first_setup/main.py b/vanilla_first_setup/main.py
index 97f3722..506ceec 100644
--- a/vanilla_first_setup/main.py
+++ b/vanilla_first_setup/main.py
@@ -113,7 +113,7 @@ class FirstSetupApplication(Adw.Application):
 }
 """
         provider = Gtk.CssProvider()
-        provider.load_from_data(css.encode())
+        provider.load_from_data(css, -1)
         Gtk.StyleContext.add_provider_for_display(
             display=Gdk.Display.get_default(),
             provider=provider,