diff --git a/libgdither.spec b/libgdither.spec
index 01ca3c3..5c7662f 100644
--- a/libgdither.spec
+++ b/libgdither.spec
@@ -1,9 +1,8 @@
 Name:           libgdither
 Version:        0.6
-Release:        17%{?dist}
+Release:        18%{?dist}
 Summary:        Library for applying dithering to PCM audio sources
 
-Group:          System Environment/Libraries
 License:        GPLv2+
 URL:            http://plugin.org.uk/libgdither/README
 Source0:        http://plugin.org.uk/libgdither/libgdither-%{version}.tar.gz
@@ -11,6 +10,7 @@ Patch0:         libgdither-0.6-default.patch
 Patch1:         libgdither-0.6-gavl.patch
 Patch2:         libgdither-0.6-ldflags.patch
 
+BuildRequires:  gcc
 BuildRequires:  fftw-devel >= 3.0.0
     
 
@@ -23,9 +23,7 @@ preserve audio quality.
 
 %package        devel
 Summary:        Development files for %{name}
-Group:          Development/Libraries
-Requires:       %{name} = %{version}-%{release}
-Requires:       pkgconfig
+Requires:       %{name}%{?_isa} = %{version}-%{release}
 
 %description    devel
 The %{name}-devel package contains libraries and header files for
@@ -42,12 +40,11 @@ developing applications that use %{name}.
 %build
 export INIT_CFLAGS="${RPM_OPT_FLAGS}"
 export LDFLAGS="%{build_ldflags}"
-make %{?_smp_mflags}
+%make_build
 
 
 %install
-rm -rf $RPM_BUILD_ROOT
-make install DESTDIR=$RPM_BUILD_ROOT LIBDIR=%{_libdir}
+%make_install LIBDIR=%{_libdir}
 find $RPM_BUILD_ROOT -name '*.la' -exec rm -f {} ';'
 
 sed -i -e 's|/usr/local|%{_prefix}|g' \
@@ -56,16 +53,15 @@ sed -i -e 's|%{_prefix}/lib|%{_libdir}|' \
   $RPM_BUILD_ROOT%{_libdir}/pkgconfig/libgdither.pc
 
 %check
-make test CFLAGS="${RPM_OPT_FLAGS} -Werror --std=c99 -I%{_builddir}/%{?buildsubdir}"
+make test CFLAGS="%{optflags} -Werror --std=c99 -I%{_builddir}/%{?buildsubdir}"
 
 
-%post -p /sbin/ldconfig
-
-%postun -p /sbin/ldconfig
+%ldconfig_scriptlets
 
 
 %files
-%doc COPYING README
+%doc README
+%license COPYING
 %{_libdir}/*.so.*
 
 %files devel
@@ -74,6 +70,9 @@ make test CFLAGS="${RPM_OPT_FLAGS} -Werror --std=c99 -I%{_builddir}/%{?buildsubd
 %{_libdir}/pkgconfig/libgdither.pc
 
 %changelog
+* Tue Jul 17 2018 Nicolas Chauvet <kwizart@gmail.com> - 0.6-18
+- Refresh spec file
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.6-17
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild