diff --git a/adwaita-icon-theme-44.0.tar.xz b/adwaita-icon-theme-44.0.tar.xz
deleted file mode 100644
index 6cbcbbe..0000000
--- a/adwaita-icon-theme-44.0.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4889c5601bbfecd25d80ba342209d0a936dcf691ee56bd6eca4cde361f1a664c
-size 2488628
diff --git a/adwaita-icon-theme-45.rc.tar.xz b/adwaita-icon-theme-45.rc.tar.xz
new file mode 100644
index 0000000..8ed30ca
--- /dev/null
+++ b/adwaita-icon-theme-45.rc.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d948ffac9e3182529580c2ad1b65e4908cc193fb9569d0a56826728bf99827a3
+size 4294164
diff --git a/adwaita-icon-theme.changes b/adwaita-icon-theme.changes
index e2ffdbe..fc34682 100644
--- a/adwaita-icon-theme.changes
+++ b/adwaita-icon-theme.changes
@@ -1,3 +1,22 @@
+-------------------------------------------------------------------
+Mon Sep  4 09:37:31 UTC 2023 - Bjørn Lie <bjorn.lie@gmail.com>
+
+- Update to version 45.rc:
+  + cursors: new hand cursors, updated spinner.
+
+-------------------------------------------------------------------
+Sat Jul  8 08:40:29 UTC 2023 - Bjørn Lie <bjorn.lie@gmail.com>
+
+- Update to version 45.beta:
+  + New meson build system
+  + fullcolor: new audio mimetype
+  + symbolic:
+    - notifications in outline style
+    - go home, user-home, notifications in outline style
+    - new weather icons
+  + cursors: tooling in python 3
+- Add meson BuildRequires and macros following upstreams port.
+
 -------------------------------------------------------------------
 Mon Mar 20 09:43:44 UTC 2023 - Bjørn Lie <bjorn.lie@gmail.com>
 
diff --git a/adwaita-icon-theme.spec b/adwaita-icon-theme.spec
index 20ce5e8..8ff98a6 100644
--- a/adwaita-icon-theme.spec
+++ b/adwaita-icon-theme.spec
@@ -17,17 +17,18 @@
 
 
 Name:           adwaita-icon-theme
-Version:        44.0
+Version:        45.rc
 Release:        0
 Summary:        GNOME Icon Theme
 License:        CC-BY-SA-3.0 OR LGPL-3.0-or-later
 Group:          System/GUI/GNOME
 URL:            https://gitlab.gnome.org/GNOME/adwaita-icon-theme
-Source0:        https://download.gnome.org/sources/adwaita-icon-theme/44/%{name}-%{version}.tar.xz
+Source0:        https://download.gnome.org/sources/adwaita-icon-theme/45/%{name}-%{version}.tar.xz
 
 BuildRequires:  fdupes
 BuildRequires:  gdk-pixbuf-loader-rsvg
 BuildRequires:  gtk3-tools >= 3.24.2
+BuildRequires:  meson
 BuildRequires:  pkgconfig
 # To make sure the icon theme cache gets generated
 Requires(post): (gtk3-tools if libgtk-3-0)
@@ -42,11 +43,11 @@ The default GNOME icon theme, Adwaita.
 %autosetup
 
 %build
-%configure
-%make_build
+%meson
+%meson_build
 
 %install
-%make_install
+%meson_install
 # Those folders disappeared in the upgrade from 2.28.0 -> 2.29.0
 # FIXME: eventually no application should install any files there
 mkdir -p %{buildroot}%{_datadir}/icons/Adwaita/scalable/actions