diff --git a/coin.spec b/coin.spec
index 0d8fa58..4f726c5 100644
--- a/coin.spec
+++ b/coin.spec
@@ -1,19 +1,25 @@
 Name:          coin
-Version:       3.1.3
-Release:       1mamba
+Version:       4.0.0
+Release:       2mamba
 Summary:       An OpenGL-based, 3D graphics library
 Group:         Development/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Ercole 'ercolinux' Carpanetto <ercole69@gmail.com>
-URL:           https://bitbucket.org/Coin3D/coin/wiki/Home
-Source:        https://bitbucket.org/Coin3D/coin/downloads/Coin-%{version}.zip
+URL:           https://github.com/coin3d/coin/wiki
+Source:		   https://github.com/coin3d/coin/archive/Coin-%{version}.zip
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
-## note: run 'autospec -u -a6 coin' to get the list of build requirements.
+BuildRequires: glibc-devel
+BuildRequires: libICE-devel
+BuildRequires: libSM-devel
+BuildRequires: libX11-devel
+BuildRequires: libXext-devel
+BuildRequires: libgcc
+BuildRequires: libglvnd-devel
+BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Coin3D is a high-level, retained-mode toolkit for effective 3D graphics development. It is API compatible with Open Inventor 2.1.
@@ -21,6 +27,7 @@ Coin3D is a high-level, retained-mode toolkit for effective 3D graphics developm
 %package -n lib%{name}
 Group:         System/Libraries
 Summary:       Shared libraries for %{name}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description -n lib%{name}
 This package contains shared libraries for %{name}.
@@ -29,20 +36,21 @@ This package contains shared libraries for %{name}.
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-## note: you can add this requirement if .pc files are provided by this package
 Requires:      pkg-config
 
 %description -n lib%{name}-devel
 This package contains libraries and header files for developing applications that use %{name}.
 
-
 %debug_package
 
 %prep
-%setup -q -n Coin-%{version}
+%setup -q -n coin-Coin-%{version}
+sed -i "s,| arm-\*  |,| aarch64-\* | arm-\*  |," cfg/config.sub
 
 %build
-%configure --disable-debug 
+%configure \
+   --disable-debug
+
 %make
 
 %install
@@ -57,72 +65,44 @@ This package contains libraries and header files for developing applications tha
 
 %files
 %defattr(-,root,root)
-%{_bindir}/coin-config
-%{_mandir}/man1/coin-config.1.gz
-%doc AUTHORS COPYING THANKS
+%{_datadir}/Coin/conf/coin-default.cfg
+%{_datadir}/Coin/scxml/navigation/*.xml
+%dir %{_datadir}/Coin
+%dir %{_datadir}/Coin/draggerDefaults
+%{_datadir}/Coin/draggerDefaults/*
+%dir %{_datadir}/Coin/scxml
+%{_datadir}/Coin/scxml/navigation
+%{_datadir}/Coin/scxml/navigation/*
+%dir %{_datadir}/Coin/shaders
+%dir %{_datadir}/Coin/shaders/lights
+%{_datadir}/Coin/shaders/lights/*
+%dir %{_datadir}/Coin/shaders/vsm
+%{_datadir}/Coin/shaders/vsm/*
 
 %files -n lib%{name}
 %defattr(-,root,root)
-%{_libdir}/libCoin.so
-%{_libdir}/libCoin.so.60
-%{_libdir}/libCoin.so.60.1.3
-%{_datadir}/Coin/draggerDefaults/*.iv
-%{_datadir}/Coin/scxml/navigation/examiner.xml
-%{_datadir}/Coin/shaders/lights/*.glsl
-%{_datadir}/Coin/shaders/vsm/*.glsl
+%{_libdir}/libCoin.so.*
+%doc AUTHORS COPYING THANKS
 
 %files -n lib%{name}-devel
 %defattr(-,root,root)
-%{_includedir}/Inventor/C/XML/*.h
-%{_includedir}/Inventor/C/base/*.h
-%{_includedir}/Inventor/C/*.h
-%{_includedir}/Inventor/C/errors/*.h
-%{_includedir}/Inventor/C/glue/*.h
-%{_includedir}/Inventor/C/threads/*.h
-%{_includedir}/Inventor/*.h
-%{_includedir}/Inventor/VRMLnodes/*.h
-%{_includedir}/Inventor/actions/*.h
-%{_includedir}/Inventor/annex/FXViz/elements/*.h
-%{_includedir}/Inventor/annex/FXViz/nodes/*.h
-%{_includedir}/Inventor/annex/ForeignFiles/*.h
-%{_includedir}/Inventor/annex/HardCopy/*.h
-%{_includedir}/Inventor/annex/Profiler/*.h
-%{_includedir}/Inventor/annex/Profiler/elements/*.h
-%{_includedir}/Inventor/annex/Profiler/engines/*.h
-%{_includedir}/Inventor/annex/Profiler/nodekits/*.h
-%{_includedir}/Inventor/annex/Profiler/nodes/*.h
-%{_includedir}/Inventor/annex/Profiler/utils/*.h
-%{_includedir}/Inventor/bundles/*.h
-%{_includedir}/Inventor/caches/*.h
-%{_includedir}/Inventor/collision/*.h
-%{_includedir}/Inventor/details/*.h
-%{_includedir}/Inventor/draggers/*.h
-%{_includedir}/Inventor/elements/*.h
-%{_includedir}/Inventor/engines/*.h
-%{_includedir}/Inventor/errors/*.h
-%{_includedir}/Inventor/events/*.h
-%{_includedir}/Inventor/fields/*.h
-%{_includedir}/Inventor/lists/*.h
-%{_includedir}/Inventor/lock/*.h
-%{_includedir}/Inventor/manips/*.h
-%{_includedir}/Inventor/misc/*.h
-%{_includedir}/Inventor/nodekits/*.h
-%{_includedir}/Inventor/nodes/*.h
-%{_includedir}/Inventor/projectors/*.h
-%{_includedir}/Inventor/scxml/*.h
-%{_includedir}/Inventor/sensors/*.h
-%{_includedir}/Inventor/system/*.h
-%{_includedir}/Inventor/threads/*.h
-%{_includedir}/Inventor/tools/*.h
-%{_includedir}/Inventor/tools/*.hpp
+%{_bindir}/coin-config
 %{_includedir}/*.h
+%dir %{_includedir}/Inventor
+%{_includedir}/Inventor/*
 %{_libdir}/libCoin.la
-%{_libdir}/pkgconfig/Coin.pc
-%{_datadir}/Coin/conf/coin-default.cfg
+%{_libdir}/libCoin.so
 %{_datadir}/aclocal/coin.m4
-%doc ChangeLog NEWS README README.MACOSX README.UNIX README.WIN32
-
+%{_mandir}/man1/coin-config.1*
+%{_libdir}/pkgconfig/Coin.pc
 
 %changelog
+* Tue Jun 22 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 4.0.0-2mamba
+- specfile fixes
+
+* Tue Feb 23 2021 Ercole 'ercolinux' Carpanetto <ercole69@gmail.com> 4.0.0-1mamba
+- update to 4.0.0
+- fixed url
+
 * Sat Jun 11 2016 Ercole 'ercolinux' Carpanetto <ercole69@gmail.com> 3.1.3-1mamba
 - package created using the webbuild interface