diff --git a/widelands-build19-fix-build-icu.patch b/widelands-build19-fix-build-icu.patch
deleted file mode 100644
index e58673a..0000000
--- a/widelands-build19-fix-build-icu.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-=== modified file 'src/graphic/text/bidi.h'
---- src/graphic/text/bidi.h	2017-01-25 18:55:59 +0000
-+++ src/graphic/text/bidi.h	2018-04-02 14:32:46 +0000
-@@ -40,7 +40,7 @@
- // True if a string contains a character from the script's code blocks
- bool has_script_character(const char* input, UI::FontSets::Selector script);
- UI::FontSet const* find_fontset(const char* word, const UI::FontSets& fontsets);
--std::string icustring2string(const UnicodeString& convertme);
-+std::string icustring2string(const icu::UnicodeString& convertme);
- std::string icuchar2string(const UChar& convertme);
- bool cannot_start_line(const UChar& c);
- bool cannot_end_line(const UChar& c);
-
diff --git a/widelands-build19-src.tar.bz2 b/widelands-build19-src.tar.bz2
deleted file mode 100644
index d2a20d6..0000000
--- a/widelands-build19-src.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e511f9d26828a2b71b64cdfc6674e6e847543b2da73961ab882acca36c7c01a6
-size 181609391
diff --git a/widelands-build20.tar.bz2 b/widelands-build20.tar.bz2
new file mode 100644
index 0000000..2d41e75
--- /dev/null
+++ b/widelands-build20.tar.bz2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:38594d98c74f357d4c31dd8ee2b056bfe921f42935935af915d11b792677bcb2
+size 232364340
diff --git a/widelands.changes b/widelands.changes
index 03769af..42a437c 100644
--- a/widelands.changes
+++ b/widelands.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Jul 10 16:50:24 UTC 2019 - Dirk Stoecker <opensuse@dstoecker.de>
+
+- update to build 20
+  Changelog see https://www.widelands.org/changelog/
+  Drop patch widelands-build19-fix-build-icu.patch (included upstream)
+
 -------------------------------------------------------------------
 Tue Oct  9 08:25:07 UTC 2018 - Guillaume GARDET <guillaume.gardet@opensuse.org>
 
diff --git a/widelands.spec b/widelands.spec
index 611a0fc..3153d3c 100644
--- a/widelands.spec
+++ b/widelands.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package widelands
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 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
@@ -17,15 +17,13 @@
 
 
 Name:           widelands
-Version:        build19
+Version:        build20
 Release:        0
 Summary:        Realtime strategy game involving map control
 License:        GPL-2.0-or-later
 Group:          Amusements/Games/Strategy/Other
 Url:            http://www.widelands.org
-Source:         https://launchpad.net/%{name}/%{version}/%{version}/+download/%{name}-%{version}-src.tar.bz2
-# PATCH-FIX-UPSTREAM widelands-build19-fix-build-icu.patch -- https://bugs.launchpad.net/widelands/+bug/1760581
-Patch0:         widelands-build19-fix-build-icu.patch
+Source:         https://launchpad.net/%{name}/%{version}/%{version}/+download/%{name}-%{version}.tar.bz2
 BuildRequires:  SDL2_gfx-devel
 BuildRequires:  SDL2_image-devel
 BuildRequires:  SDL2_mixer-devel
@@ -37,16 +35,12 @@ BuildRequires:  fdupes
 BuildRequires:  gcc-c++
 BuildRequires:  gettext
 BuildRequires:  glew-devel
+BuildRequires:  graphviz-gnome
 BuildRequires:  hicolor-icon-theme
-# use more specific boost dependencies where possible to avoid redundant
-# dependencies (boo#1062802)
-%if 0%{?suse_version} >= 1330
 BuildRequires:  libboost_headers-devel
 BuildRequires:  libboost_regex-devel
+BuildRequires:  libboost_system-devel
 BuildRequires:  libboost_test-devel
-%else
-BuildRequires:  boost-devel
-%endif
 BuildRequires:  libicu-devel
 BuildRequires:  libjpeg-devel
 BuildRequires:  libpng-devel
@@ -87,8 +81,7 @@ Additional debugging data for Widelands. This package is not needed for normal
 operation.
 
 %prep
-%setup -q -n %{name}-%{version}-src
-%patch0
+%setup -q
 sed -i '/wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=uninitialized")/d' CMakeLists.txt
 sed -i 's/\(install(TARGETS ${NAME} DESTINATION \)"."\( COMPONENT ExecutableFiles)\)/\1bin\2/' cmake/WlFunctions.cmake
 
@@ -114,7 +107,7 @@ for i in 16 32 48 64 128; do
   install -D -m 0644 data/images/logos/wl-ico-${i}.png %{buildroot}%{_datadir}/icons/hicolor/${i}x${i}/apps/%{name}.png
 done
 
-install -D -m 0644 debian/widelands.desktop %{buildroot}%{_datadir}/applications/%{name}.desktop
+install -D -m 0644 debian/org.widelands.widelands.desktop %{buildroot}%{_datadir}/applications/%{name}.desktop
 %suse_update_desktop_file %{name} -r Game StrategyGame
 desktop-file-edit --set-icon=%{name} %{buildroot}%{_datadir}/applications/%{name}.desktop