diff --git a/js/ui/environment.js b/js/ui/environment.js
index a1863268c..224456d6a 100644
--- a/js/ui/environment.js
+++ b/js/ui/environment.js
@@ -9,6 +9,7 @@ imports.gi.versions.Atspi = '2.0';
 imports.gi.versions.Clutter = Config.LIBMUTTER_API_VERSION;
 imports.gi.versions.Cogl = Config.LIBMUTTER_API_VERSION;
 imports.gi.versions.Gcr = '4';
+imports.gi.versions.Gdk = '4.0';
 imports.gi.versions.Gdm = '1.0';
 imports.gi.versions.Geoclue = '2.0';
 imports.gi.versions.Gio = '2.0';
@@ -42,7 +43,7 @@ try {
     _injectSoup3Compat(Soup);
 }
 
-const { Clutter, Gio, GLib, GObject, Meta, Polkit, Shell, St } = imports.gi;
+const {Clutter, Gdk, Gio, GLib, GObject, Meta, Polkit, Shell, St} = imports.gi;
 const Gettext = imports.gettext;
 const System = imports.system;
 const SignalTracker = imports.misc.signalTracker;
@@ -453,6 +454,9 @@ function init() {
     Math.clamp = function (x, lower, upper) {
         return Math.min(Math.max(x, lower), upper);
     };
+
+    // Prevent extensions from opening a display connection to ourselves
+    Gdk.set_allowed_backends('');
 }
 
 // adjustAnimationTime: