diff --git a/.gitignore b/.gitignore
index 46b2346..c72ee0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 SOURCES/cbindgen-vendor.tar.xz
 SOURCES/nspr-4.32.0-1.el8_1.src.rpm
 SOURCES/nss-3.67.0-7.el8_1.src.rpm
-SOURCES/thunderbird-91.7.0.processed-source.tar.xz
-SOURCES/thunderbird-langpacks-91.7.0-20220308.tar.xz
+SOURCES/thunderbird-91.13.0.processed-source.tar.xz
+SOURCES/thunderbird-langpacks-91.13.0-20220819.tar.xz
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index 53e4f08..e7e17ff 100644
--- a/.thunderbird.metadata
+++ b/.thunderbird.metadata
@@ -1,5 +1,5 @@
 c822547dbc12e2baebdfdfb38b665e23f0c2513a SOURCES/cbindgen-vendor.tar.xz
 b5fd1332d8e0d37339ae170c7bebcb63a40b22e0 SOURCES/nspr-4.32.0-1.el8_1.src.rpm
 8fff814901e03c2518ede2f8992d898f5ba61ed9 SOURCES/nss-3.67.0-7.el8_1.src.rpm
-0d9dea815661a0ad101d2fd758be855a542f2797 SOURCES/thunderbird-91.7.0.processed-source.tar.xz
-eab467b27d7ff768518cbb6ee38cc8b1ab793920 SOURCES/thunderbird-langpacks-91.7.0-20220308.tar.xz
+4def481a0e18a393bc756888f3da179187272fcf SOURCES/thunderbird-91.13.0.processed-source.tar.xz
+7a3d28c5d6f3266cacad2e42ca9c2cc9b90dd27e SOURCES/thunderbird-langpacks-91.13.0-20220819.tar.xz
diff --git a/README.debrand b/README.debrand
deleted file mode 100644
index 01c46d2..0000000
--- a/README.debrand
+++ /dev/null
@@ -1,2 +0,0 @@
-Warning: This package was configured for automatic debranding, but the changes
-failed to apply.
diff --git a/SOURCES/python-missing-utimensat.patch b/SOURCES/python-missing-utimensat.patch
deleted file mode 100644
index d19ecab..0000000
--- a/SOURCES/python-missing-utimensat.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -up python3/Python-3.6.8/configure.old python3/Python-3.6.8/configure
---- Python-3.6.8/configure.old	2019-10-01 12:56:35.074551835 +0200
-+++ Python-3.6.8/configure	2019-10-01 12:56:44.240517798 +0200
-@@ -11438,7 +11438,7 @@ for ac_func in alarm accept4 setitimer g
-  sigaction sigaltstack siginterrupt sigpending sigrelse \
-  sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy symlinkat sync \
-  sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
-- truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
-+ truncate uname unlinkat unsetenv utimes waitid waitpid wait3 wait4 \
-  wcscoll wcsftime wcsxfrm wmemcmp writev _getpty
- do :
-   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index f18e104..ff9f43b 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -19,7 +19,7 @@ function dist_to_rhel_minor(str, start)
   end
   match = string.match(str, ".el8")
   if match then
-     return 6
+     return 7
   end
 end}
 
@@ -125,10 +125,17 @@ end}
 
 %global official_branding       1
 %global build_langpacks         1
+
+# Workaround the dreaded "upstream source file changed content" rpmdiff failure that only secalert can waive.
+# If set to .b2 or .b3 ... the processed source file needs to be renamed before upload, e.g.
+# thunderbird-91.9.0.b2.processed-source.tar.xz
+# When unset use processed source file name as is.
+#global buildnum .b2
+
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        91.7.0
-Release:        2%{?dist}
+Version:        91.13.0
+Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -148,9 +155,9 @@ ExcludeArch:    s390 ppc
 # The official tarball has to be always processed by the process-official-tarball
 # script.
 # Link to official tarball: https://archive.mozilla.org/pub/thunderbird/releases/%%{version}%%{?pre_version}/source/thunderbird-%%{version}%%{?pre_version}.source.tar.xz
-Source0:        thunderbird-%{version}%{?pre_version}.processed-source.tar.xz
+Source0:        thunderbird-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{build_langpacks}
-Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20220308.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20220819.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        get-calendar-langpacks.sh
@@ -171,7 +178,7 @@ Source402:      nspr-4.32.0-1.el8_1.src.rpm
 # Build patches
 # workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1699374
 Patch1001:      build-ppc64le-inline.patch
-Patch1003:      python-missing-utimensat.patch
+#Patch1003:      python-missing-utimensat.patch
 Patch1008:        build-rhel7-nasm-dwarf.patch
 Patch1009:        build-debuginfo-fix.patch
 # workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1699374
@@ -1107,8 +1114,35 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
-* Tue Apr 05 2022 CentOS Sources <bugs@centos.org> - 91.7.0-2.el9.centos
-- Apply debranding changes
+* Fri Aug 19 2022 Eike Rathke <erack@redhat.com> - 91.13.0-1
+- Update to 91.13.0 build1
+
+* Mon Jul 25 2022 Eike Rathke <erack@redhat.com> - 91.12.0-1
+- Update to 91.12.0 build1
+
+* Tue Jun 28 2022 Eike Rathke <erack@redhat.com> - 91.11.0-2
+- Update to 91.11.0 build2
+
+* Thu Jun 23 2022 Eike Rathke <erack@redhat.com> - 91.11.0-1
+- Update to 91.11.0 build1
+
+* Mon May 30 2022 Eike Rathke <erack@redhat.com> - 91.10.0-1
+- Update to 91.10.0 build1
+
+* Mon May 23 2022 Jan Horak <jhorak@redhat.com> - 91.9.1-1
+- Update to 91.9.1 build1
+
+* Tue May 03 2022 Eike Rathke <erack@redhat.com> - 91.9.0-3
+- Update to 91.9.0 build3
+
+* Mon May 02 2022 Eike Rathke <erack@redhat.com> - 91.9.0-2
+- Update to 91.9.0 build2
+
+* Thu Apr 28 2022 Eike Rathke <erack@redhat.com> - 91.9.0-1
+- Update to 91.9.0
+
+* Tue Apr 05 2022 Eike Rathke <erack@redhat.com> - 91.8.0-1
+- Update to 91.8.0
 
 * Tue Mar 08 2022 Eike Rathke <erack@redhat.com> - 91.7.0-2
 - Update to 91.7.0 build2