diff --git a/_service b/_service
index 0dc4f70..17b9e02 100644
--- a/_service
+++ b/_service
@@ -1,9 +1,66 @@
 <services>
   <service name="tar_scm" mode="disabled">
+    <param name="exclude">.depend</param>
+    <param name="exclude">.github</param>
+    <param name="exclude">.gitignore</param>
+    <param name="exclude">.travis.yml</param>
+    <param name="exclude">Dockerfile</param>
+    <param name="exclude">LICENSE</param>
+    <param name="exclude">Makefile</param>
+    <param name="exclude">README.md</param>
+    <param name="exclude">doc</param>
+    <param name="exclude">icons/.xvpics</param>
+    <param name="exclude">icons/U.16x16x16m.png</param>
+    <param name="exclude">icons/U.24x24x16m.png</param>
+    <param name="exclude">icons/U.256x256x16m.png</param>
+    <param name="exclude">icons/U.32x32x16.bmp</param>
+    <param name="exclude">icons/U.32x32x16m.png</param>
+    <param name="exclude">icons/U.32x32x256.bmp</param>
+    <param name="exclude">icons/U.32x32x256.xpm</param>
+    <param name="exclude">icons/U.48x48x16m.png</param>
+    <param name="exclude">icons/U.ico</param>
+    <param name="exclude">icons/Unison.gif</param>
+    <param name="exclude">icons/Unison.xpm</param>
+    <param name="exclude">icons/success.gif</param>
+    <param name="exclude">icons/svg_to_data.ml</param>
+    <param name="exclude">icons/unison-icon.ai</param>
+    <param name="exclude">icons/unison-logo.gif</param>
+    <param name="exclude">icons/unison.haruo.jpg</param>
+    <param name="exclude">setup</param>
+    <param name="exclude">src/.depend</param>
+    <param name="exclude">src/CONTRIB</param>
+    <param name="exclude">src/INSTALL.gtk2</param>
+    <param name="exclude">src/INSTALL.win32-cygwin-gnuc</param>
+    <param name="exclude">src/INSTALL.win32-msvc</param>
+    <param name="exclude">src/INSTALL.win32</param>
+    <param name="exclude">src/INSTALL</param>
+    <param name="exclude">src/Makefile.OCaml</param>
+    <param name="exclude">src/Makefile</param>
+    <param name="exclude">src/README</param>
+    <param name="exclude">src/ROADMAP.txt</param>
+    <param name="exclude">src/TODO.txt</param>
+    <param name="exclude">src/fsmonitor.py</param>
+    <param name="exclude">src/fsmonitor/linux/Makefile</param>
+    <param name="exclude">src/fsmonitor/solaris</param>
+    <param name="exclude">src/fsmonitor/windows</param>
+    <param name="exclude">src/lwt/META</param>
+    <param name="exclude">src/lwt/Makefile</param>
+    <param name="exclude">src/lwt/depend</param>
+    <param name="exclude">src/lwt/example</param>
+    <param name="exclude">src/lwt/win</param>
+    <param name="exclude">src/system/system_win_stubs.c</param>
+    <param name="exclude">src/system/win</param>
+    <param name="exclude">src/ubase/META</param>
+    <param name="exclude">src/ubase/Makefile</param>
+    <param name="exclude">src/uimac</param>
+    <param name="exclude">src/unison.hgr</param>
+    <param name="exclude">src/win32rc</param>
+    <param name="exclude">src/winmain.c</param>
+    <param name="exclude">tests</param>
+    <param name="exclude">unicode_utils</param>
     <param name="filename">unison</param>
-    <param name="revision">f29b364cad83c71f5620c0df3b9b0049b62d2d60</param>
+    <param name="revision">4ad8511150dee24e924f25247342b370e8b8b651</param>
     <param name="scm">git</param>
-    <param name="subdir">src</param>
     <param name="submodules">disable</param>
     <param name="url">https://github.com/bcpierce00/unison.git</param>
     <param name="versionformat">@PARENT_TAG@</param>
diff --git a/unison-2.51.4.tar.xz b/unison-2.51.4.tar.xz
deleted file mode 100644
index 82334b9..0000000
--- a/unison-2.51.4.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d4e3f75471425b75d951a12f277be38d05ec10b75e3cbe9a7bc54785162a7d40
-size 486696
diff --git a/unison-2.52.0.tar.xz b/unison-2.52.0.tar.xz
new file mode 100644
index 0000000..bc71994
--- /dev/null
+++ b/unison-2.52.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a3a71e6f2213be6c2e2afbb91c027f94a1dd6c49719a581fe356fa8d559d899b
+size 349556
diff --git a/unison.changes b/unison.changes
index 7d13a74..73391e2 100644
--- a/unison.changes
+++ b/unison.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Mon Apr  4 04:04:04 UTC 2022 - olaf@aepfle.de
+
+- Update to version 2.52.0
+  * wireprotocol is now independent from OCaml version
+  * see included changelog for details
+- Build with dune
+- Provide unison-text binary
+
 -------------------------------------------------------------------
 Thu Jun 24 15:15:15 UTC 2021 - olaf@aepfle.de
 
diff --git a/unison.png b/unison.png
deleted file mode 100644
index daf0dc0..0000000
--- a/unison.png
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:87234ff28f298784cdf2dbe7e7887806ff348d30e1a8e8db92849c7fbb7b8c7f
-size 2586
diff --git a/unison.spec b/unison.spec
index 747711e..cab9f6e 100644
--- a/unison.spec
+++ b/unison.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package unison
 #
-# Copyright (c) 2021 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,7 +17,7 @@
 
 
 Name:           unison
-Version:        2.51.4
+Version:        2.52.0
 Release:        0
 %{?ocaml_preserve_bytecode}
 Summary:        File synchronization tool
@@ -29,12 +29,11 @@ Source0:        %name-%version.tar.xz
 #https://www.cis.upenn.edu/~bcpierce/unison/download/releases/stable/unison-manual.html
 Source1:        unison-2.48.4-manual.html
 Source2:        %name.desktop
-Source3:        %name.png
-BuildRequires:  ocaml-lablgtk2-devel > 2.18.5
-BuildRequires:  ocaml-rpm-macros >= 20210409
+BuildRequires:  ocaml(ocaml_base_version) >= 4.08
+BuildRequires:  ocaml-dune >= 2.3
+BuildRequires:  ocaml-rpm-macros >= 20220222
 BuildRequires:  ocamlfind(findlib)
-BuildRequires:  ocamlfind(ppx_bin_prot)
-BuildRequires:  pkgconfig(gdk-2.0)
+BuildRequires:  ocamlfind(lablgtk2)
 BuildRequires:  pkgconfig(ncursesw)
 %if 0%{?suse_version} > 0
 BuildRequires:  update-desktop-files
@@ -51,12 +50,18 @@ replica to the other.
 %setup -q
 
 %build
-make UISTYLE=gtk2 NATIVE=true
+dune_release_pkgs='unison,unison-gui,unison-fsmonitor'
+%ocaml_dune_setup
+%ocaml_dune_build
 
 %install
-install -m 755 -D %name %buildroot%_bindir/%name
-install -m 755 -D %name-fsmonitor %buildroot%_bindir/%name-fsmonitor
-install -m 644 -D %{SOURCE3} %buildroot%_datadir/pixmaps/%name.png
+%ocaml_dune_install
+%ocaml_create_file_list
+rm -rfv %buildroot%ocaml_standard_library
+
+mv %buildroot%_bindir/%name %buildroot%_bindir/%name-text
+mv %buildroot%_bindir/%name-gui %buildroot%_bindir/%name
+install -m 644 -D icons/U.svg %buildroot%_datadir/pixmaps/%name.svg
 install -m 644 %{SOURCE1} unison-manual.html
 %if %{defined suse_update_desktop_file}
 %suse_update_desktop_file -i %name Utility SyncUtility
@@ -66,10 +71,11 @@ install -m 644 -D %{SOURCE2} %buildroot/%_datadir/applications/%name.desktop
 
 %files
 %defattr(-,root,root,-)
-%doc COPYING NEWS README unison-manual.html
+%doc src/COPYING unison-manual.html
 %_datadir/applications/*
 %_datadir/pixmaps/*
 %_bindir/%name
+%_bindir/%name-text
 %_bindir/%name-fsmonitor
 
 %changelog