diff --git a/subprojects/extensions-app/data/ui/extension-row.ui b/subprojects/extensions-app/data/ui/extension-row.ui
index ec56fedc9..f41d8fbb7 100644
--- a/subprojects/extensions-app/data/ui/extension-row.ui
+++ b/subprojects/extensions-app/data/ui/extension-row.ui
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="3.20"/>
   <template class="ExtensionRow" parent="GtkListBoxRow">
     <property name="activatable">False</property>
     <child>
diff --git a/subprojects/extensions-app/data/ui/extensions-window.ui b/subprojects/extensions-app/data/ui/extensions-window.ui
index f049bd7e3..faafa0509 100644
--- a/subprojects/extensions-app/data/ui/extensions-window.ui
+++ b/subprojects/extensions-app/data/ui/extensions-window.ui
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="3.20"/>
   <menu id="primary-menu">
     <section>
       <item>
diff --git a/subprojects/extensions-app/js/main.js b/subprojects/extensions-app/js/main.js
index 48d382f3f..cbdac693f 100644
--- a/subprojects/extensions-app/js/main.js
+++ b/subprojects/extensions-app/js/main.js
@@ -4,7 +4,7 @@ imports.gi.versions.Gtk = '4.0';
 
 const Gettext = imports.gettext;
 const Package = imports.package;
-const { Gdk, GLib, Gio, GObject, Gtk, Shew } = imports.gi;
+const { Adw, Gdk, GLib, Gio, GObject, Gtk, Shew } = imports.gi;
 
 Package.initFormat();
 
@@ -38,7 +38,7 @@ function toggleState(action) {
 }
 
 var Application = GObject.registerClass(
-class Application extends Gtk.Application {
+class Application extends Adw.Application {
     _init() {
         GLib.set_prgname('gnome-extensions-app');
         super._init({ application_id: Package.name });