diff --git a/kdiff3.spec b/kdiff3.spec
index af3bdc6..508e6fb 100644
--- a/kdiff3.spec
+++ b/kdiff3.spec
@@ -1,5 +1,5 @@
 Name:          kdiff3
-Version:       0.9.98
+Version:       1.8.1
 Release:       1mamba
 Summary:       A graphical text difference analyzer for up to 3 input files
 Group:         Graphical Desktop/Applications/Development
@@ -7,13 +7,13 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
 URL:           http://kdiff3.sourceforge.net/
-Source:        http://downloads.sourceforge.net/project/kdiff3/kdiff3/%{version}/kdiff3-%{version}.tar.gz
+Source:        https://download.kde.org/stable/kdiff3/kdiff3-%{version}.tar.xz
+#Source:        http://downloads.sourceforge.net/project/kdiff3/kdiff3/%{version}/kdiff3-%{version}.tar.gz
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: kdelibs4-devel
 BuildRequires: libgcc
-BuildRequires: libqt4-devel
+BuildRequires: libqt5-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 BuildRequires: cmake
@@ -41,57 +41,39 @@ KDiff3 is a program that:
 %setup -q
 
 %build
-%cmake_kde4 -d build
+%cmake_kde5 -d build
 %make
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 %makeinstall -C build
 
-# install desktop file
-desktop-file-install \
-  --vendor="" \
-  --add-category="Qt" \
-  --add-category="KDE" \
-  --add-category="Development" \
-  --dir %{buildroot}%{_kde4_xdgappsdir} \
-  %{buildroot}%{_kde4_xdgappsdir}/kdiff3.desktop
-
-%find_lang %{name} \
-   --all-name
-
-# replace absolute symlinks with relative ones
-if [ -d %{buildroot}%{_kde4_docdir}/HTML ]; then
-for langdir in %{buildroot}%{_kde4_docdir}/HTML/* ; do
-  if [ -d $langdir ]; then
-    lang=$(basename $langdir)
-    echo "%lang($lang) %{_kde4_docdir}/HTML/$lang/*" >> %{name}.lang
-    for link in $langdir/*; do
-       [ -d $link -a -L $link/common ] && rm -f $link/common && ln -sf ../common $link/common
-    done
-  fi
-done
-fi
+%find_lang %{name} --all-name --with-html --with-man
 
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
 %files -f %{name}.lang
 %defattr(-,root,root)
-%{_kde4_bindir}/kdiff3
-#%{_kde4_libdir}/kde4/libkdiff3*.so
-%{_kde4_libdir}/kde4/kdiff3fileitemaction.so
-%{_kde4_xdgappsdir}/kdiff3.desktop
-%{_kde4_datadir}/kdiff3
-%{_kde4_datadir}/kdiff3part/kdiff3_part.rc
-%{_kde4_icondir}/hicolor/*/apps/kdiff3.png
-%{_kde4_icondir}/locolor/*/apps/kdiff3.png
-%{_kde4_servicesdir}/kdiff3*.desktop
-%{_kde4_htmldir}/*/kdiff3
+%{_bindir}/kdiff3
+%{_libdir}/qt5/plugins/kf5/kfileitemaction/kdiff3fileitemaction.so
+%{_libdir}/qt5/plugins/kf5/parts/kdiff3part.so
+%{_datadir}/applications/org.kde.kdiff3.desktop
+%{_datadir}/metainfo/org.kde.kdiff3.appdata.xml
+%{_datadir}/kservices5/kdiff3part.desktop
+%dir %{_datadir}/kxmlgui5/kdiff3
+%{_datadir}/kxmlgui5/kdiff3/kdiff3_shell.rc
+%dir %{_datadir}/kxmlgui5/kdiff3part
+%{_datadir}/kxmlgui5/kdiff3part/kdiff3_part.rc
+%{_datadir}/icons/hicolor/*/apps/kdiff3.png
+%{_datadir}/icons/hicolor/scalable/apps/kdiff3.svgz
+%{_mandir}/man1/kdiff3.1*
 %doc AUTHORS COPYING
-#ChangeLog NEWS README TODO
 
 %changelog
+* Thu Aug 15 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 1.8.1-1mamba
+- update to 1.8.1
+
 * Sat Jul 05 2014 Automatic Build System <autodist@mambasoft.it> 0.9.98-1mamba
 - automatic version update by autodist