diff --git a/gnome-desktop.spec b/gnome-desktop.spec
index 2c7de26..134bbc2 100644
--- a/gnome-desktop.spec
+++ b/gnome-desktop.spec
@@ -1,7 +1,7 @@
-%define majver %(echo %version | cut -d. -f 1-2)
+%define majver %(echo %version | cut -d. -f 1)
 
 Name:          gnome-desktop
-Version:       3.38.4
+Version:       40.0
 Release:       1mamba
 Summary:       Libraries for the Gnome desktop
 Group:         System/Libraries
@@ -9,8 +9,8 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://www.gnome.org
-# bugfixes: http://ftp.gnome.org/pub/GNOME/sources/%{pkgname}
-Source:        http://ftp.gnome.org/pub/GNOME/sources/gnome-desktop/%{majver}/gnome-desktop-%{version}.tar.xz
+# bugfixes: https://download.gnome.org/sources/%{pkgname}
+Source:        https://download.gnome.org/sources/gnome-desktop/%{majver}/gnome-desktop-%{version}.tar.xz
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: GConf-devel
@@ -49,10 +49,9 @@ BuildRequires: gnome-doc-utils-devel
 # API documentation
 BuildRequires: gsettings-desktop-schemas-devel
 BuildRequires: itstool
-Obsoletes:     libgnome-desktop
+Obsoletes:     libgnome-desktop < 40.0
 Provides:      libgnome-desktop = %{?epoch:%epoch:}%{version}-%{release}
-Obsoletes:     gnome-desktop12
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+Obsoletes:     gnome-desktop12 < 40.0
 
 %description
 The gnome-desktop package contains an internal library (libgnomedesktop) used to implement some portions of the GNOME desktop, and also some data files and other shared components of the GNOME user environment.
@@ -60,15 +59,14 @@ The gnome-desktop package contains an internal library (libgnomedesktop) used to
 %package devel
 Summary:       Devel package for libgnome-desktop
 Group:         Development/Libraries
-Obsoletes:     libgnome-desktop-devel
-Obsoletes:     gnome-desktop12-devel
+Obsoletes:     libgnome-desktop-devel < 40.0
+Obsoletes:     gnome-desktop12-devel < 40.0
 Provides:      libgnome-desktop-devel = %{?epoch:%epoch:}%{version}-%{release}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description devel
 The gnome-desktop package contains an internal library (libgnomedesktop) used to implement some portions of the GNOME desktop, and also some data files and other shared components of the GNOME user environment.
-
-This package contains static libraries and header files need for development.
+This package contains static libraries and header files needed for development.
 
 %package apidocs
 Summary:       %{pkgname} API documentation
@@ -78,6 +76,8 @@ Requires:      gtk-doc
 %description apidocs
 %{pkgname} API documentation.
 
+%debug_package
+
 %prep
 %setup -q
 
@@ -112,8 +112,8 @@ rm -rf %{buildroot}/var/scrollkeeper
 #%{_bindir}/*
 %{_libdir}/*.so.*
 %{_libdir}/girepository-1.0/GnomeDesktop-3.0.typelib
-%{_libexecdir}/gnome-rr-debug
-#%{_datadir}/libgnome-desktop-3.0/pnp.ids
+%dir %{_libexecdir}/gnome-desktop-debug
+%{_libexecdir}/gnome-desktop-debug/*
 %{_datadir}/gnome/*
 %{_datadir}/help/*/fdl/index.docbook
 %{_datadir}/help/*/gpl/index.docbook
@@ -132,6 +132,9 @@ rm -rf %{buildroot}/var/scrollkeeper
 %{_datadir}/gtk-doc/html/%{name}3/
 
 %changelog
+* Sat Apr 10 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 40.0-1mamba
+- update to 40.0
+
 * Wed Feb 17 2021 Automatic Build System <autodist@mambasoft.it> 3.38.4-1mamba
 - automatic version update by autodist