diff --git a/.gitignore b/.gitignore
index b92cd08..07f1955 100644
--- a/.gitignore
+++ b/.gitignore
@@ -63,3 +63,4 @@ mercurial-1.6.2.tar.gz
 /mercurial-4.7.tar.gz
 /contrib-hg-ssh.patch
 /mercurial-4.9.tar.gz
+/mercurial-5.1.2.tar.gz
diff --git a/mercurial.spec b/mercurial.spec
index 20429f0..47f805a 100644
--- a/mercurial.spec
+++ b/mercurial.spec
@@ -2,8 +2,8 @@
 
 Summary: Mercurial -- a distributed SCM
 Name: mercurial
-Version: 4.9
-Release: 2%{?dist}
+Version: 5.1.2
+Release: 1%{?dist}
 
 # Release: 1.rc1%%{?dist}
 
@@ -68,7 +68,7 @@ and executes Mercurial commands.
 %prep
 %setup -q -n %{name}-%{upstreamversion}
 # Patch files to use python2 instead of (since lately) non existent python binary.
-sed -i 's|python|python2|' %{_builddir}/%{name}-%{version}/Makefile %{_builddir}/%{name}-%{version}/doc/Makefile
+sed -ri 's|python\b|python2|' %{_builddir}/%{name}-%{version}/Makefile %{_builddir}/%{name}-%{version}/doc/Makefile
 %patch0 -p1 -b .contrib-hg-ssh
 
 %build
@@ -173,6 +173,10 @@ grep -v locale %{name}-base.files > %{name}-base-filtered.files
 ##cd tests && %%{__python} run-tests.py
 
 %changelog
+* Sat Oct 19 2019 Petr Stodulka <pstodulk@redhat.com> - 5.1.2-1
+- Update to 5.1.2
+- fix patching of Makefiles
+
 * Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 4.9-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
 
@@ -185,7 +189,7 @@ grep -v locale %{name}-base.files > %{name}-base-filtered.files
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 4.7-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild
 
-* Mon Aug 20 2018 Petr Stodulka <pstodulk@redhat.com< - 4.7-1
+* Mon Aug 20 2018 Petr Stodulka <pstodulk@redhat.com> - 4.7-1
 - Update to 4.7
 
 * Sat Aug 11 2018 Tom Prince <tom.prince@ualberta.net> - 4.5.3-1
diff --git a/sources b/sources
index bea31f3..821a8b0 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mercurial-4.9.tar.gz) = 59a5467cebb51f17cce7bcada37f8d85906493ab2e3d443ceeae2c6598fb69d2d59f1e99c73bd08345c5f90501a7bae0d70e04c770ea7653ec30648e591c97fb
+SHA512 (mercurial-5.1.2.tar.gz) = a8ce9d9220a5ddf452264801f06e81fe1e699ff700d085e3f82c6877910c6ef0e594203590f198b7b9e31c9a1ed627c8fa2a3a1513d0c5087cf775835a78c408