diff --git a/NEWS b/NEWS
index 0d6732a..9d17b93 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,22 @@
+Version 4.0:
+- Some refactoring of the SELinux relabelling code
+- The SELinux relabelling code is now usable on non-transactional systems as well
+- Split SELinux relabelling code into separate package
+- Add automated testing of SELinux relabelling functionality
+- Use multiple threads for SELinux relabelling
+- Don't relabel in the zipl initrd "initgrub" mode
+- 98selinux-microos: Avoid "/sysroot-selinux: not mounted" on new util-linux
+- Install man-online alias only for bash
+- Add man-online command
+- Drop support for sle15 builds
+- Add OBS CI workflow
+- 98selinux-microos: Set mount propagation properly
+- 98selinux-microos: Convert tabs to spaces
+- 98selinux-microos: Don't include setenforce unnecessarily
+- Add spec file
+- systemd-proxy-env: fix typos in setup-systemd-proxy-env
+- Bump version to 4.0 to have a higher version than the previous selinux-autorelabel
+
 Version 2.21:
 - 98selinux-microos: Work around overlayfs bug [bsc#1210690]
 - 98selinux-microos: Create .relabelled marker before relabelling
diff --git a/configure.ac b/configure.ac
index 1195de5..abe970a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT([microos-tools], [2.21])
+AC_INIT([microos-tools], [4.0])
 AM_INIT_AUTOMAKE
 AC_PREFIX_DEFAULT(/usr)
 
diff --git a/microos-tools.spec b/microos-tools.spec
index 10137c1..94ea2d3 100644
--- a/microos-tools.spec
+++ b/microos-tools.spec
@@ -19,7 +19,7 @@
 %{!?_distconfdir: %global _distconfdir %{_prefix}%{_sysconfdir}}
 
 Name:           microos-tools
-Version:        2.21+git0
+Version:        4.0
 Release:        0
 Summary:        Files and Scripts for openSUSE MicroOS
 License:        GPL-2.0-or-later