diff --git a/octave.spec b/octave.spec
index 58bb783..a1eb614 100644
--- a/octave.spec
+++ b/octave.spec
@@ -1,5 +1,5 @@
 Name:          octave
-Version:       3.8.2
+Version:       4.0.0
 Release:       1mamba
 Summary:       A high-level language, primarily intended for numerical computations
 Group:         Applications/Mathematics
@@ -7,7 +7,7 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://www.octave.org
-Source0:       ftp://ftp.gnu.org/gnu/octave/octave-%{version}.tar.bz2
+Source0:       ftp://ftp.gnu.org/gnu/octave/octave-%{version}.tar.xz
 Source1:       octave.png
 Patch0:        %{name}-3.4.2-curl_remove_include.patch
 License:       GPL
@@ -125,7 +125,10 @@ install -D -m 644 %{SOURCE1} \
 %{_libdir}/%{name}/%{version}/lib*.so.*
 %dir %{_datadir}/%{name}
 %{_datadir}/%{name}/*
+%{_datadir}/appdata/www.octave.org-octave.appdata.xml
 %{_datadir}/applications/www.octave.org-%{name}.desktop
+%{_datadir}/icons/hicolor/*/apps/octave.png
+%{_datadir}/icons/hicolor/scalable/apps/octave.svg
 %{_datadir}/pixmaps/%{name}.png
 %dir %{_libexecdir}/%{name}/%{version}
 %{_libexecdir}/%{name}/%{version}/*
@@ -152,6 +155,9 @@ install -D -m 644 %{SOURCE1} \
 %doc ChangeLog README NEWS INSTALL
 
 %changelog
+* Sun Aug 02 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 4.0.0-1mamba
+- update to 4.0.0
+
 * Mon Sep 01 2014 Stefano Cotta Ramusino <stefano.cotta@openmamba.org> 3.8.2-1mamba
 - update to 3.8.2