diff --git a/mate-system-monitor-1.18.1.tar.xz b/mate-system-monitor-1.18.1.tar.xz
deleted file mode 100644
index 4ae9f15..0000000
--- a/mate-system-monitor-1.18.1.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7a2aa5c6364d5deb9e9c3ff0ece65f9485a6039c47d81c0681ae1702523b1ff6
-size 2159100
diff --git a/mate-system-monitor-1.20.0.tar.xz b/mate-system-monitor-1.20.0.tar.xz
new file mode 100644
index 0000000..e0bde6b
--- /dev/null
+++ b/mate-system-monitor-1.20.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c5f2ab0884b338cad0819b5e5f3b869e5039e16455db140e8b9afc07a4cf2a15
+size 2149220
diff --git a/mate-system-monitor-gtk-3.20.patch b/mate-system-monitor-gtk-3.20.patch
new file mode 100644
index 0000000..9cf4d5a
--- /dev/null
+++ b/mate-system-monitor-gtk-3.20.patch
@@ -0,0 +1,16 @@
+--- a/configure.ac
++++ b/configure.ac
+@@ -28,11 +28,11 @@ LT_PREREQ([2.2])
+ LT_INIT
+ 
+ # Package dependencies
+-GLIB_REQUIRED=2.50.0
++GLIB_REQUIRED=2.48.0
+ LIBGTOP_REQUIRED=2.23.1
+ GIOMM_REQUIRED=2.26.0
+ GLIBMM_REQUIRED=2.22
+-GTK_REQUIRED=3.22.0
++GTK_REQUIRED=3.20.0
+ GTKMM_REQUIRED=3.8.1
+ LIBWNCK_REQUIRED=3.0.0
+ LIBXML_REQUIRED=2.0
diff --git a/mate-system-monitor.changes b/mate-system-monitor.changes
index e6ae07b..36bd29f 100644
--- a/mate-system-monitor.changes
+++ b/mate-system-monitor.changes
@@ -1,3 +1,20 @@
+-------------------------------------------------------------------
+Fri Mar  9 19:10:07 UTC 2018 - sor.alexei@meowr.ru
+
+- Update to version 1.20.0:
+  * Require GTK+ 3.22 and GLib 2.50.
+  * Avoid deprecated gdk_screen_width/height().
+  * sysinfo: Avoid deprecated GtkAlignment.
+  * Fix system logo alignment.
+  * An implementation of WidthOfScreen and HeightOfScreen.
+  * process table: Make search case-insensitive.
+  * procman.cpp: Fix "argument 1 null where non-null expected".
+  * sysinfo.cpp: Fix "this 'if' clause does not guard..."
+  * proctable.cpp: Fix "this 'else' clause does not guard..."
+  * Update translations.
+- Add mate-system-monitor-gtk-3.20.patch: Restore GLib 2.48 and
+  GTK+ 3.20 support.
+
 -------------------------------------------------------------------
 Wed Oct 25 14:20:21 UTC 2017 - sor.alexei@meowr.ru
 
diff --git a/mate-system-monitor.spec b/mate-system-monitor.spec
index e41012c..54d7403 100644
--- a/mate-system-monitor.spec
+++ b/mate-system-monitor.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package mate-system-monitor
 #
-# 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
@@ -16,20 +16,21 @@
 #
 
 
-%define _version 1.18
+%define _version 1.20
 Name:           mate-system-monitor
-Version:        1.18.1
+Version:        1.20.0
 Release:        0
 Summary:        MATE Desktop system monitor
-License:        GPL-2.0+
+License:        GPL-2.0-or-later
 Group:          System/GUI/Other
 Url:            https://mate-desktop.org/
 Source:         http://pub.mate-desktop.org/releases/%{_version}/%{name}-%{version}.tar.xz
 # PATCH-FIX-OPENSUSE mate-system-monitor-xdgsu.patch sor.alexei@meowr.ru -- Use xdg-su instead of gksu.
-Patch0:         %{name}-xdgsu.patch
+Patch0:         mate-system-monitor-xdgsu.patch
+# PATCH-FEATURE-OPENSUSE mate-system-monitor-gtk-3.20.patch -- Restore GLib 2.48 and GTK+ 3.20 support.
+Patch1:         mate-system-monitor-gtk-3.20.patch
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
-BuildRequires:  libxml2-python
 BuildRequires:  mate-common >= %{_version}
 BuildRequires:  pkgconfig
 BuildRequires:  polkit
@@ -37,9 +38,9 @@ BuildRequires:  update-desktop-files
 BuildRequires:  yelp-tools
 BuildRequires:  pkgconfig(dbus-glib-1)
 BuildRequires:  pkgconfig(dconf)
-BuildRequires:  pkgconfig(glib-2.0)
-BuildRequires:  pkgconfig(gtk+-3.0) >= 3.14
-BuildRequires:  pkgconfig(gtkmm-3.0)
+BuildRequires:  pkgconfig(glib-2.0) >= 2.48
+BuildRequires:  pkgconfig(gtk+-3.0) >= 3.20
+BuildRequires:  pkgconfig(gtkmm-3.0) >= 3.20
 BuildRequires:  pkgconfig(libgtop-2.0)
 BuildRequires:  pkgconfig(librsvg-2.0)
 BuildRequires:  pkgconfig(libsystemd)
@@ -60,6 +61,7 @@ resources such as CPU and memory.
 %prep
 %setup -q
 %patch0 -p1
+%patch1 -p1
 
 %build
 NOCONFIGURE=1 mate-autogen
@@ -76,7 +78,7 @@ make %{?_smp_mflags} V=1
 %suse_update_desktop_file %{buildroot}%{_datadir}/applications/%{name}.desktop
 %fdupes %{buildroot}%{_datadir}/
 
-%if 0%{?suse_version} <= 1320
+%if 0%{?suse_version} < 1500
 %post
 %desktop_database_post
 %glib2_gsettings_schema_post
@@ -87,7 +89,12 @@ make %{?_smp_mflags} V=1
 %endif
 
 %files
-%doc AUTHORS COPYING NEWS
+%if 0%{?suse_version} >= 1500
+%license COPYING
+%else
+%doc COPYING
+%endif
+%doc AUTHORS NEWS
 %doc %{_datadir}/help/C/%{name}/
 %{_bindir}/%{name}
 %{_libexecdir}/mate-system-monitor/