diff --git a/marble.spec b/marble.spec
index 73df97c..a8bdbf5 100644
--- a/marble.spec
+++ b/marble.spec
@@ -1,6 +1,6 @@
 Name:          marble
 Version:       20.08.1
-Release:       1mamba
+Release:       2mamba
 Summary:       A free open source geographical map program
 Group:         Graphical Desktop/Applications/Educational
 Vendor:        openmamba
@@ -13,8 +13,10 @@ Patch1:        marble-15.12.2-gcc-5.3.0-std_isnan.patch
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libQt5ExtSerialPort-devel
-BuildRequires: libQt5WebKit-devel
+BuildRequires: ldconfig
+%ifnarch arm
+BuildRequires: libQt5WebEngine-devel
+%endif
 BuildRequires: libattica5-devel
 BuildRequires: libgcc
 BuildRequires: libgps-devel
@@ -35,8 +37,9 @@ BuildRequires: libkrunner-devel
 BuildRequires: libkservice-devel
 BuildRequires: libktextwidgets-devel
 BuildRequires: libkwidgetsaddons-devel
+BuildRequires: libkwindowsystem-devel
 BuildRequires: libkxmlgui-devel
-BuildRequires: libphonon-qt5-devel
+BuildRequires: libphonon-devel
 BuildRequires: libplasma-framework-devel
 BuildRequires: libqt5-devel
 BuildRequires: libsonnet-devel
@@ -48,6 +51,7 @@ BuildRequires: libgps-devel >= 3.21-1mamba
 BuildRequires: cmake
 Provides:      marble5
 Obsoletes:     marble5
+Obsoletes:     marble4
 Requires:      libmarble = %{?epoch:%epoch:}%{version}-%{release}
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -72,9 +76,10 @@ Choose between a Flat Map ("Plate carré"), Mercator or the Globe.
 
 %package -n libmarble
 Group:         Graphical Desktop/Libraries/KDE
-Summary:       KDE5 library files for %{name}
+Summary:       Library files for %{name}
 Provides:      libmarble5
 Obsoletes:     libmarble5
+Obsoletes:     libmarble4
 
 %description -n libmarble
 This package contains shared libraries for %{name}.
@@ -85,6 +90,7 @@ Summary:       Marble development files
 Requires:      libmarble = %{?epoch:%epoch:}%{version}-%{release}
 Provides:      libmarble5-devel
 Obsoletes:     libmarble5-devel
+Obsoletes:     libmarble4-devel
 
 %description -n libmarble-devel
 This package contains libraries and header files for developing applications that use %{name}.
@@ -203,6 +209,9 @@ exit 0
 %doc docs/*
 
 %changelog
+* Wed Sep 09 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 20.08.1-2mamba
+- obsolete libmarble4
+
 * Fri Sep 04 2020 Automatic Build System <autodist@mambasoft.it> 20.08.1-1mamba
 - automatic version update by autodist