diff --git a/gnome-calendar.spec b/gnome-calendar.spec
index e89a15a..bf66888 100644
--- a/gnome-calendar.spec
+++ b/gnome-calendar.spec
@@ -2,18 +2,18 @@
 %global gsettings_desktop_schemas_version 3.21.2
 %global edataserver_version 3.45.1
 %global glib2_version 2.67.5
-%global gtk4_version 4.6.0
+%global gtk4_version 4.11.2
 
 %global tarball_version %%(echo %{version} | tr '~' '.')
 
 Name:           gnome-calendar
-Version:        44.1
+Version:        45~beta
 Release:        %autorelease
 Summary:        Simple and beautiful calendar application designed to fit GNOME 3
 
 License:        GPL-3.0-or-later
 URL:            https://wiki.gnome.org/Apps/Calendar
-Source0:        https://download.gnome.org/sources/%{name}/44/%{name}-%{tarball_version}.tar.xz
+Source0:        https://download.gnome.org/sources/%{name}/45/%{name}-%{tarball_version}.tar.xz
 
 BuildRequires:  gcc
 BuildRequires:  gettext
diff --git a/sources b/sources
index 0717027..ea4d5e8 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gnome-calendar-44.1.tar.xz) = 318ac8d78b41e352816dc4c5f8510d2e8f5b989cea25cb37af6a1d2af3a54307d8f8cc55649b03b381a53b18dbe826d1c84833841334a2878baedaee45d36f8c
+SHA512 (gnome-calendar-45.beta.tar.xz) = 35d01b1acbffad292f0c7eb5f87521608789e2d4643adda57ed534eea01166286995f45a6398572fc02e303b670cce72000f3105ab8d852a7a00a2e00b3c3813