diff --git a/.gitignore b/.gitignore
index b47761f..6930729 100644
--- a/.gitignore
+++ b/.gitignore
@@ -182,3 +182,4 @@ gnome-shell-2.31.5.tar.bz2
 /gnome-shell-3.37.92.tar.xz
 /gnome-shell-3.38.0.tar.xz
 /gnome-shell-3.38.1.tar.xz
+/gnome-shell-40.alpha.tar.xz
diff --git a/0001-windowManager-Avoid-calling-meta_window_actor_thaw-w.patch b/0001-windowManager-Avoid-calling-meta_window_actor_thaw-w.patch
deleted file mode 100644
index 3f9f9c8..0000000
--- a/0001-windowManager-Avoid-calling-meta_window_actor_thaw-w.patch
+++ /dev/null
@@ -1,36 +0,0 @@
-From 6ba3ca5f9548ba0a87a9e3ffa129716d0a062e1e Mon Sep 17 00:00:00 2001
-From: Daniel van Vugt <daniel.van.vugt@canonical.com>
-Date: Fri, 2 Oct 2020 16:33:31 +0800
-Subject: [PATCH] windowManager: Avoid calling meta_window_actor_thaw when not
- frozen
-
-Because that tends to crash in:
-```
-g_error ("Error in freeze/thaw accounting");
-```
-
-Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1431
-
-https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1453
----
- js/ui/windowManager.js | 4 ++++
- 1 file changed, 4 insertions(+)
-
-diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
-index ab86a2e6a3..91b764ea8d 100644
---- a/js/ui/windowManager.js
-+++ b/js/ui/windowManager.js
-@@ -1378,6 +1378,10 @@ var WindowManager = class {
-             onStopped: () => this._sizeChangeWindowDone(shellwm, actor),
-         });
- 
-+        // ease didn't animate and cleared the info, we are done
-+        if (!actor.__animationInfo)
-+            return;
-+
-         // Now unfreeze actor updates, to get it to the new size.
-         // It's important that we don't wait until the animation is completed to
-         // do this, otherwise our scale will be applied to the old texture size.
--- 
-2.28.0
-
diff --git a/gnome-shell.spec b/gnome-shell.spec
index 61694ac..f2d1a8b 100644
--- a/gnome-shell.spec
+++ b/gnome-shell.spec
@@ -1,16 +1,15 @@
 Name:           gnome-shell
-Version:        3.38.1
-Release:        2%{?dist}
+Version:        40.0~alpha
+Release:        1%{?dist}
 Summary:        Window management and application launching for GNOME
 
 License:        GPLv2+
 URL:            https://wiki.gnome.org/Projects/GnomeShell
 #VCS:           git:git://git.gnome.org/gnome-shell
-Source0:        http://download.gnome.org/sources/gnome-shell/3.38/%{name}-%{version}.tar.xz
+Source0:        http://download.gnome.org/sources/gnome-shell/40/%{name}-40.alpha.tar.xz
 
 # Replace Epiphany with Firefox in the default favourite apps list
 Patch1: gnome-shell-favourite-apps-firefox.patch
-Patch2: 0001-windowManager-Avoid-calling-meta_window_actor_thaw-w.patch
 
 %define eds_version 3.33.1
 %define gnome_desktop_version 3.35.91
@@ -18,7 +17,7 @@ Patch2: 0001-windowManager-Avoid-calling-meta_window_actor_thaw-w.patch
 %define gobject_introspection_version 1.49.1
 %define gjs_version 1.57.3
 %define gtk3_version 3.15.0
-%define mutter_version 3.38.0
+%define mutter_version 40.0~alpha
 %define polkit_version 0.100
 %define gsettings_desktop_schemas_version 3.33.1
 %define ibus_version 1.5.2
@@ -143,7 +142,7 @@ innovative user interface concepts to provide a visually attractive and
 easy to use experience.
 
 %prep
-%autosetup -S git
+%autosetup -S git -n %{name}-40.alpha
 
 %build
 %meson -Dextensions_app=false
@@ -218,6 +217,9 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/evolution-calendar.de
 %{_mandir}/man1/gnome-shell.1*
 
 %changelog
+* Wed Dec 02 2020 Florian Müllner <fmuellner@redhat.com> - 40.alpha-1
+- Update to 40.alpha
+
 * Tue Oct 13 2020 Florian Müllner <fmuellner@redhat.com> - 3.38.1-2
 - Fix crash on size change (non-)transitions
 
diff --git a/sources b/sources
index e0675a3..82545ef 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gnome-shell-3.38.1.tar.xz) = 7ab580f892c4b4dac2fc8625343dfab1bf7a11e148dc01e6e805a5b1ac1d4cb17943b9a3058ec69fc086c270d76ef8073dca494991a5da1dcfa52b42dcc03f01
+SHA512 (gnome-shell-40.alpha.tar.xz) = b3e3fda51dcb4380cd4f0b91bbbcd9415cb0857a548ac0a757078baa319113a08f9596af4e605154ab4964b21e7c1cdc2772ebd90c5b6d6feb9060ded30417ce