diff --git a/.gitignore b/.gitignore
index 07f1955..eacd14c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,4 @@ mercurial-1.6.2.tar.gz
 /contrib-hg-ssh.patch
 /mercurial-4.9.tar.gz
 /mercurial-5.1.2.tar.gz
+/mercurial-5.2.tar.gz
diff --git a/0001-setup-hg3.patch b/0001-setup-hg3.patch
index 699dfb3..3edd7d2 100644
--- a/0001-setup-hg3.patch
+++ b/0001-setup-hg3.patch
@@ -15,7 +15,7 @@ index 99556ce..5e30421 100644
 --- a/setup.py
 +++ b/setup.py
 @@ -207,6 +207,8 @@ def write_if_changed(path, content):
-             fh.write(content)
+ 
  
  scripts = ['hg']
 +if 'HGPYTHON3' in os.environ:
diff --git a/hgk_python3.patch b/hgk_python3.patch
deleted file mode 100644
index f82ab36..0000000
--- a/hgk_python3.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/hgext/hgk.py b/hgext/hgk.py
-index 3da626e..61239e8 100644
---- a/hgext/hgk.py
-+++ b/hgext/hgk.py
-@@ -335,7 +335,7 @@ def revtree(ui, args, repo, full="tree", maxnr=0, parents=False):
-     ('[OPTION]... REV...'))
- def revlist(ui, repo, *revs, **opts):
-     """print revisions"""
--    if opts['header']:
-+    if opts[u'header']:
-         full = "commit"
-     else:
-         full = None
diff --git a/mercurial.spec b/mercurial.spec
index f7d5d90..5f58d7c 100644
--- a/mercurial.spec
+++ b/mercurial.spec
@@ -1,7 +1,7 @@
 Summary: Mercurial -- a distributed SCM
 Name: mercurial
-Version: 5.1.2
-Release: 2%{?dist}
+Version: 5.2
+Release: 1%{?dist}
 
 # Release: 1.rc1%%{?dist}
 
@@ -14,7 +14,6 @@ URL: http://www.selenic.com/mercurial/
 Source0: http://www.selenic.com/mercurial/release/%{name}-%{upstreamversion}.tar.gz
 Source1: mercurial-site-start.el
 Patch0: contrib-hg-ssh.patch
-Patch1: hgk_python3.patch
 Patch2: 0001-setup-hg3.patch
 BuildRequires: python2 python2-devel bash-completion
 BuildRequires: emacs-nox emacs-el pkgconfig gettext python2-docutils
@@ -46,7 +45,8 @@ BuildRequires: emacs-nox emacs-el pkgconfig gettext python3-docutils
 Requires: %{name}-lang = %{version}-%{release}
 
 %description py3
-Subpackage with mercurial for Python3. This is beta version with own problems.
+Subpackage with mercurial for Python3. It's expected to be obsoleted when
+dependent packages are prepared to use Python3 by default.
 
 
 %package hgk
@@ -89,13 +89,14 @@ Locales for mercurial.
 # NOTE: Use PYTHON envar instead of pathing Makefiles
 # sed -ri 's|python\b|python2|' %{_builddir}/%{name}-%{version}/Makefile %{_builddir}/%{name}-%{version}/doc/Makefile
 %patch0 -p1 -b .contrib-hg-ssh
-# NOTE: The patch1 cannot be applied here as it has to be kept as it is for py2 version..
-# %%patch1 -p1 -b .hgk_python3
 %patch2 -p1 -b .create_hg3
 
 %build
 # copy hg to hg3 to be able to create /usr/bin/hg3 script
 cp -a hg hg3
+# HGPYTHON3 is not needed since mercurial 5.2 for building & installation, but
+# let's keep it for now as we can use is simply to create HG3 executable. Can
+# be dropped with -py3 subpackage
 PYTHON=%{__python3} HGPYTHON3=1 make all
 PYTHON=%{__python2} make all
 
@@ -219,6 +220,12 @@ grep -v locale %{name}3-base.files > %{name}3-base-filtered.files
 
 
 %changelog
+* Mon Nov 25 2019 Petr Stodulka <pstodulk@redhat.com> - 5.2-1
+- Update to 5.2
+- Mercurial port is now much more stable on Python3 than before;
+  still some issues can be discovered regarding the Python3
+- Relates: #1737931
+
 * Sat Oct 19 2019 Petr Stodulka <pstodulk@redhat.com> - 5.1.2-2
 - first attempt to create builds for py2 & py3 version
 - separate lang into the own subpackage as files are shared between
diff --git a/sources b/sources
index 821a8b0..0b980ad 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mercurial-5.1.2.tar.gz) = a8ce9d9220a5ddf452264801f06e81fe1e699ff700d085e3f82c6877910c6ef0e594203590f198b7b9e31c9a1ed627c8fa2a3a1513d0c5087cf775835a78c408
+SHA512 (mercurial-5.2.tar.gz) = c6437f09e852c597f15ecb2445e000db4673718190504e2336367a01655be76e9f95af53e4d09a81596cb5f1f6b32524132798430e2543e1931f3edb8bbe42b2