diff --git a/.gitignore b/.gitignore
index d1ac5b2..6061a9e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -208,3 +208,4 @@ mutter-2.31.5.tar.bz2
 /mutter-44.0.tar.xz
 /mutter-44.1.tar.xz
 /mutter-44.2.tar.xz
+/mutter-45.alpha.tar.xz
diff --git a/mutter.spec b/mutter.spec
index defc521..1fd5758 100644
--- a/mutter.spec
+++ b/mutter.spec
@@ -7,18 +7,18 @@
 %global pipewire_version 0.3.33
 %global lcms2_version 2.6
 %global colord_version 1.4.5
-%global mutter_api_version 12
+%global mutter_api_version 13
 
 %global tarball_version %%(echo %{version} | tr '~' '.')
 
 Name:          mutter
-Version:       44.2
+Version:       45~alpha
 Release:       %autorelease
 Summary:       Window and compositing manager based on Clutter
 
 License:       GPLv2+
 URL:           http://www.gnome.org
-Source0:       http://download.gnome.org/sources/%{name}/44/%{name}-%{tarball_version}.tar.xz
+Source0:       http://download.gnome.org/sources/%{name}/45/%{name}-%{tarball_version}.tar.xz
 
 # Work-around for OpenJDK's compliance test
 Patch0:        0001-window-actor-Special-case-shaped-Java-windows.patch
diff --git a/sources b/sources
index 199d5d3..6e61a48 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mutter-44.2.tar.xz) = 5c58cac46a571bd9fabca8326cf973c79d9d47bd223b39476e143f30e435900859e5cef1858bc343261ad9c026166647b940c5becc6d788d99d947bd003e12da
+SHA512 (mutter-45.alpha.tar.xz) = c819fa6d1ee1e41f4dee702c6b8ee7b5ede3f689a6a55e245f40d3bc8013c8414eb7077224bd8e33c9536fdf089fbc4cd7fe7a7d071cafe392c6281169c28c4b