diff --git a/rawtherapee.spec b/rawtherapee.spec
index 77cffd9..18d9b80 100644
--- a/rawtherapee.spec
+++ b/rawtherapee.spec
@@ -1,15 +1,12 @@
 Name:           rawtherapee
-Version:        5.2
-Release:        2%{?dist}
+Version:        5.3
+Release:        0.1%{?dist}
 Summary:        Raw image processing software
 
 Group:          Applications/Multimedia 
 License:        GPLv3 and MIT and IJG
 URL:            http://www.rawtherapee.com/
-Source0:        http://rawtherapee.com/shared/source/%{name}-%{version}.tar.xz
-# Backported upstream patch for fixing CVE-2017-13735
-# https://github.com/Beep6581/RawTherapee/issues/4061
-Patch0:         rawtherapee-CVE-2017-13735.patch
+Source0:        http://rawtherapee.com/shared/source/%{name}-%{version}-rc1.tar.xz
 
 BuildRequires:  cmake
 BuildRequires:  desktop-file-utils
@@ -29,6 +26,7 @@ BuildRequires:  libpng-devel
 BuildRequires:  libsigc++20-devel
 BuildRequires:  libtiff-devel
 BuildRequires:  zlib-devel
+BuildRequires:  lensfun-devel
 
 Requires:       fftw
 Requires:       hicolor-icon-theme
@@ -44,7 +42,7 @@ many parameters to enhance the raw picture before finally exporting it
 to some common image format.
 
 %prep
-%autosetup -p1 -n %{name}-%{version}
+%autosetup -p1 -n %{name}-%{version}-rc1
 
 # fix wrong line endings
 sed -i "s|\r||g" LICENSE.txt
@@ -74,7 +72,7 @@ rm -rf %{buildroot}/%{_datadir}/doc
 
 %check
 desktop-file-validate %{buildroot}/%{_datadir}/applications/%{name}.desktop
-appstream-util validate-relax --nonet %{buildroot}/%{_datadir}/appdata/%{name}.appdata.xml
+appstream-util validate-relax --nonet %{buildroot}/%{_datadir}/metainfo/%{name}.appdata.xml
 
 
 %post
@@ -103,11 +101,17 @@ fi || :
 %{_libdir}/*.so
 %{_datadir}/%{name}
 %{_datadir}/applications/%{name}.desktop
-%{_datadir}/appdata/%{name}.appdata.xml
+%{_datadir}/metainfo/%{name}.appdata.xml
 %{_datadir}/icons/hicolor/*/apps/%{name}.png
 
 
 %changelog
+* Mon Sep 25 2017 Matthew Miller <mattdm@fedoraproject.org> - 5.3-0.1
+- upstream 5.3 rc1 for rawhide
+- includes fix for CVE-2017-13735
+- lensfun is now required (enabling new lens correction feature)
+- appdata -> metainfo dir
+
 * Sun Sep 10 2017 Mattia Verga <mattia.verga@email.it> - 5.2-2
 - Backport upstream patch for fixing CVE-2017-13735