diff --git a/newt-0.52.20.tar.gz b/newt-0.52.20.tar.gz
deleted file mode 100644
index dc84b26..0000000
--- a/newt-0.52.20.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8d66ba6beffc3f786d4ccfee9d2b43d93484680ef8db9397a4fb70b5adbb6dbc
-size 181163
diff --git a/newt-0.52.21.tar.gz b/newt-0.52.21.tar.gz
new file mode 100644
index 0000000..4139f36
--- /dev/null
+++ b/newt-0.52.21.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:265eb46b55d7eaeb887fca7a1d51fe115658882dfe148164b6c49fccac5abb31
+size 174895
diff --git a/newt.changes b/newt.changes
index f96fae0..7673dc6 100644
--- a/newt.changes
+++ b/newt.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Thu Apr 23 08:18:18 UTC 2020 - Martin Pluskal <mpluskal@suse.com>
+
+- Update to version 0.52.21:
+  * define env NEWT_NOFLOWCTRL to disable flow control (Robert Gill)
+  * don't leak memory on errors in dialogboxes
+  * fix radio button selection check in snack
+  * fix plural forms in Lithuanian translation (#1568999)
+  * fix parallel build (Émeric Dupont)
+  * allow python versions to be specified with --with-python option
+
 -------------------------------------------------------------------
 Fri Aug  2 08:15:55 UTC 2019 - Martin Liška <mliska@suse.cz>
 
diff --git a/newt.spec b/newt.spec
index 928cf22..eff046b 100644
--- a/newt.spec
+++ b/newt.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package newt
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2020 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -18,10 +18,10 @@
 
 %define         libname lib%{name}
 %define         libsoname %{libname}0_52
+%{!?python2_sitearch: %global python2_sitearch %(python -c "from distutils.sysconfig import get_python_lib; print get_python_lib(1)")}
 %bcond_without python2
-%{!?python2_sitearch: %global python2_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib(1)")}
 Name:           newt
-Version:        0.52.20
+Version:        0.52.21
 Release:        0
 Summary:        A library for text mode user interfaces
 License:        LGPL-2.1-or-later
@@ -33,6 +33,7 @@ Source10:       %{name}-rpmlintrc
 Patch0:         newt-0.52.20-implicit-pointer-decl.patch
 # needed for tutorial.pdf
 BuildRequires:  docbook-toys
+BuildRequires:  fdupes
 BuildRequires:  pkgconfig
 BuildRequires:  popt-devel
 BuildRequires:  python3-devel
@@ -46,7 +47,6 @@ BuildRequires:  texlive-times
 %if %{with python2}
 BuildRequires:  python-devel
 %endif
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
 Newt is a programming library for color text-mode, widget-based user
@@ -200,6 +200,7 @@ popd 1>/dev/null
 %endif
 %py3_compile %{buildroot}/%{python3_sitearch}
 %py3_compile -O %{buildroot}/%{python3_sitearch}
+%fdupes %{buildroot}/%{python3_sitearch}
 # pointless examples
 rm %{buildroot}%{_defaultdocdir}/%{name}/examples/*.py
 
@@ -212,7 +213,7 @@ rm %{buildroot}%{_defaultdocdir}/%{name}/examples/*.py
 %if 0%{?suse_version} >= 01500
 %license %{_defaultdocdir}/%{name}/COPYING
 %else
-%doc %{_defaultdocdir}/%{name}/COPYING
+%license %{_defaultdocdir}/%{name}/COPYING
 %endif
 %{_bindir}/whiptail
 %{_mandir}/man1/whiptail.1%{?ext_man}