diff --git a/libwnck.changes b/libwnck.changes
index acc8940..6924f40 100644
--- a/libwnck.changes
+++ b/libwnck.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Feb 28 16:36:40 UTC 2018 - dimstar@opensuse.org
+
+- Modernize spec-file by calling spec-cleaner
+
 -------------------------------------------------------------------
 Fri Jul 28 08:24:24 UTC 2017 - zaitor@opensuse.org
 
diff --git a/libwnck.spec b/libwnck.spec
index 8a7f9a1..635c84c 100644
--- a/libwnck.spec
+++ b/libwnck.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libwnck
 #
-# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -20,22 +20,22 @@ Name:           libwnck
 Version:        3.24.1
 Release:        0
 Summary:        Window Navigator Construction Kit (Library Package)
-License:        LGPL-2.1+
+License:        LGPL-2.1-or-later
 Group:          Development/Libraries/GNOME
-Url:            https://git.gnome.org/browse/libwnck
+URL:            https://git.gnome.org/browse/libwnck
 Source:         http://download.gnome.org/sources/libwnck/3.24/%{name}-%{version}.tar.xz
 Source99:       baselibs.conf
 BuildRequires:  fdupes
 BuildRequires:  gettext
 BuildRequires:  gobject-introspection-devel
-%if !0%{?is_opensuse}
-BuildRequires:  translation-update-upstream
-%endif
+BuildRequires:  pkgconfig
 BuildRequires:  pkgconfig(gtk+-3.0) >= 3.22.0
 BuildRequires:  pkgconfig(libstartup-notification-1.0)
 BuildRequires:  pkgconfig(x11)
 BuildRequires:  pkgconfig(xres)
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
+%if !0%{?is_opensuse}
+BuildRequires:  translation-update-upstream
+%endif
 
 %description
 The Window Navigator Construction Kit is a library that can be used to
@@ -44,13 +44,9 @@ write task lists, pagers, and similar GNOME programs.
 %package -n libwnck-3-0
 Summary:        Window Navigator Construction Kit (Library Package)
 Group:          Development/Libraries/GNOME
+Recommends:     %{name}-lang
 Provides:       %{name} = %{version}
 Obsoletes:      %{name} < %{version}
-Recommends:     %{name}-lang
-# bug437293
-%ifarch ppc64
-Obsoletes:      libwnck-64bit
-%endif
 #
 
 %description -n libwnck-3-0
@@ -82,10 +78,6 @@ Summary:        Include Files and Libraries mandatory for Development
 Group:          Development/Libraries/GNOME
 Requires:       libwnck-3-0 = %{version}
 Requires:       typelib-1_0-Wnck-3_0 = %{version}
-# bug437293
-%ifarch ppc64
-Obsoletes:      libwnck-devel-64bit
-%endif
 Obsoletes:      libwnck-doc < %{version}
 Provides:       libwnck-doc = %{version}
 
@@ -94,6 +86,7 @@ This package contains all necessary include files and libraries needed
 to develop applications that require these.
 
 %lang_package
+
 %prep
 %setup -q
 %if !0%{?is_opensuse}
@@ -104,39 +97,32 @@ translation-update-upstream
 %build
 %configure\
         --disable-static
-%__make %{?jobs:-j%jobs} V=1
+make %{?_smp_mflags} V=1
 
 %install
-%makeinstall
+%make_install
 rm %{buildroot}%{_libdir}/*.*a
 %find_lang %{name}-3.0
 %fdupes %{buildroot}
 
-%clean
-rm -rf %{buildroot}
-
 %post -n libwnck-3-0 -p /sbin/ldconfig
-
 %postun -n libwnck-3-0 -p /sbin/ldconfig
 
 %files tools
-%defattr(-,root,root)
 %{_bindir}/wnck-urgency-monitor
 %{_bindir}/wnckprop
 
 %files lang -f %{name}-3.0.lang
 
 %files -n libwnck-3-0
-%defattr(-,root,root)
-%doc AUTHORS COPYING README NEWS ChangeLog
+%license COPYING
+%doc AUTHORS README NEWS ChangeLog
 %{_libdir}/*.so.*
 
 %files -n typelib-1_0-Wnck-3_0
-%defattr(-,root,root)
 %{_libdir}/girepository-1.0/Wnck-3.0.typelib
 
 %files devel
-%defattr(-,root,root)
 %{_includedir}/libwnck-3.0/
 %{_libdir}/pkgconfig/libwnck-3.0.pc
 %{_libdir}/*.so