diff --git a/muse.spec b/muse.spec
index 1237eca..c3609e5 100644
--- a/muse.spec
+++ b/muse.spec
@@ -1,44 +1,54 @@
 ### AUTOUPDATE-OFF: 8
 Name:          muse
-Version:       3.1.1
+Version:       4.0
 Release:       1mamba
 Summary:       A MIDI/Audio sequencer with recording and editing capabilities 
 Group:         Graphical Desktop/Applications/Multimedia
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://www.muse-sequencer.org/
+URL:           https://www.muse-sequencer.org/
 Source0:       http://downloads.sourceforge.net/sourceforge/lmuse/muse-%{version}.tar.gz
 Source1:       %{name}.png
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
-BuildRequires: fluidsynth-devel >= 1.0.6
 BuildRequires: glibc-devel
 BuildRequires: libalsa-devel
-BuildRequires: libfontconfig-devel
-BuildRequires: libfreetype-devel
+BuildRequires: libatk-devel
+BuildRequires: libatkmm1-devel
+BuildRequires: libcairo-devel
+BuildRequires: libcairomm-devel
+BuildRequires: libdbus-devel
+BuildRequires: libfluidsynth-devel
 BuildRequires: libgcc
-BuildRequires: libGL-devel
-BuildRequires: libICE-devel
-BuildRequires: libjack-devel >= 0.100.0
-BuildRequires: libjpeg-devel
-BuildRequires: liblash-devel >= 0.5.2
-BuildRequires: libmng-devel
-BuildRequires: libpng-devel
-BuildRequires: libqt3-devel >= 3.3.5
+BuildRequires: libgdk-pixbuf-devel
+BuildRequires: libglib-devel
+BuildRequires: libglibmm24-devel
+BuildRequires: libglvnd-devel
+BuildRequires: libgtk2-devel
+BuildRequires: libgtkmm2-devel
+BuildRequires: libharfbuzz-devel
+BuildRequires: libinstpatch-devel
+BuildRequires: libjack-devel
+BuildRequires: liblash-devel
+BuildRequires: liblilv-devel
+BuildRequires: liblo-devel
+BuildRequires: liblrdf-devel
+BuildRequires: libpango-devel
+BuildRequires: libpangomm1-devel
+BuildRequires: libpython39-devel
+BuildRequires: libqt5-devel
+BuildRequires: librtaudio-devel
+BuildRequires: librubberband-devel
 BuildRequires: libsamplerate-devel
-BuildRequires: libSM-devel
-BuildRequires: libsndfile-devel >= 1.0.11
+BuildRequires: libserd-devel
+BuildRequires: libsigc++2-devel
+BuildRequires: libsndfile-devel
+BuildRequires: libsord-devel
+BuildRequires: libsratom-devel
 BuildRequires: libstdc++6-devel
-BuildRequires: libX11-devel
-BuildRequires: libXcursor-devel
-BuildRequires: libXext-devel
-BuildRequires: libXft-devel
-BuildRequires: libXinerama-devel
-BuildRequires: libXmu-devel
-BuildRequires: libXrandr-devel
-BuildRequires: libXrender-devel
-BuildRequires: libz-devel
+BuildRequires: libuuid-devel
+BuildRequires: libxml2-devel
 ## AUTOBUILDREQ-END
 BuildRequires: liblcms-devel >= 1.14
 BuildRequires: libladcca-devel >= 0.4.0
@@ -48,7 +58,6 @@ BuildRequires: jadetex >= 3.13
 BuildRequires: libe2fs-devel >= 1.38
 BuildRequires: wine-devel >= 1:0.9.23
 Requires:      fst
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 MusE is a MIDI/Audio sequencer with recording and editing capabilities written by Werner Schweer. 
@@ -73,12 +82,12 @@ MusE aims to be a complete multitrack virtual studio for Linux.
 
 %files
 %defattr(-,root,root)
-%{_bindir}/muse3
+%{_bindir}/muse4
 %{_bindir}/muse_plugin_scan
 %{_bindir}/grepmidi
-%{_datadir}/applications/org.musesequencer.Muse3.desktop
-%{_datadir}/icons/hicolor/64x64/apps/org.musesequencer.Muse3.png
-%{_datadir}/metainfo/org.musesequencer.Muse3.appdata.xml
+%{_datadir}/applications/org.musesequencer.Muse4.desktop
+%{_datadir}/icons/hicolor/*/apps/muse.png
+%{_datadir}/metainfo/org.musesequencer.Muse4.appdata.xml
 %dir %{_datadir}/muse-*
 %{_datadir}/muse-*/*
 %dir %{_libdir}/muse-*
@@ -92,7 +101,7 @@ MusE aims to be a complete multitrack virtual studio for Linux.
 %{_libdir}/muse-*/synthi/*.so
 %{_datadir}/mime/packages/muse.xml
 %{_mandir}/man1/grepmidi.1*
-%{_mandir}/man1/muse3.1*
+%{_mandir}/man1/muse4.1*
 %dir %{_docdir}/muse-*
 %{_docdir}/muse-*/*
 %doc COPYING
@@ -100,6 +109,9 @@ MusE aims to be a complete multitrack virtual studio for Linux.
 #% doc README.ladspaguis README.shortcuts README.softsynth README.translate
 
 %changelog
+* Wed Apr 28 2021 Automatic Build System <autodist@mambasoft.it> 4.0-1mamba
+- automatic version update by autodist
+
 * Sun Jul 26 2020 Automatic Build System <autodist@mambasoft.it> 3.1.1-1mamba
 - automatic version update by autodist