diff --git a/CHANGES.md b/CHANGES.md
index a04956e1..f0e7396e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,13 @@
+Changes in version 4.0.0 (20220825) - Welcome moodle-cs
+-------------------------------------------------------
+- [PR#192](https://github.com/moodlehq/moodle-local_codechecker/pull/192), [PR#197](https://github.com/moodlehq/moodle-local_codechecker/pull/197): Various fixes to own CI tests (stronk7).
+- [PR#193](https://github.com/moodlehq/moodle-local_codechecker/pull/193): Move to use the [moodle-cs](https://github.com/moodlehq/moodle-cs) standard that is now the source for everything else and should be the one used for all (tools, editors, IDEs...) integration. (Andrew Lyons and stronk7). This change includes, noticeably:
+    - PHP_CodeSniffer updated to current 3.7.1.
+    - moodle-cs updated to current 3.2.4+.
+    - Adjust tests, docs and other bits to keep everything working.
+- [PR#199](https://github.com/moodlehq/moodle-local_codechecker/pull/199): Correct handling of empty files (Michael Milette).
+- [PR#200](https://github.com/moodlehq/moodle-local_codechecker/pull/200): Fix GitHub repository URLs (David Mudrák).
+
 Changes in version 3.1.0 (20220225) - Fondant chocolate
 -------------------------------------------------------
 - [PR#176](https://github.com/moodlehq/moodle-local_codechecker/pull/176): Avoid some `use` statements to make the `MOODLE_INTERNAL` check to be required (stronk7).
diff --git a/docs/ReleaseNewVersion.md b/docs/ReleaseNewVersion.md
index 81d53f9c..11e7e890 100644
--- a/docs/ReleaseNewVersion.md
+++ b/docs/ReleaseNewVersion.md
@@ -17,8 +17,6 @@ Create a commit with message, and, optionally, anything worth commenting in the
 Bump to YYYYMMDD (vX.Y.Z) - <<release name, if any>>
 ```
 
-(and, optionally, anything worth commenting in the commit description)
-
 Once the version bump PR has been reviewed and incorporated upstream, then you need to tag the release, that will trigger a new CI build (right now [@ GHA](https://github.com/moodlehq/moodle-local_codechecker/actions)) to run the integration testing.
 
 Tag `master` branch `HEAD` and push using commands:
diff --git a/version.php b/version.php
index 73e5ba4d..1010067b 100644
--- a/version.php
+++ b/version.php
@@ -24,8 +24,8 @@
 
 defined('MOODLE_INTERNAL') || die;
 
-$plugin->version   = 2022022500;;
-$plugin->release   = '3.1.0';
+$plugin->version   = 2022082500;;
+$plugin->release   = '4.0.0';
 $plugin->maturity  = MATURITY_STABLE;
-$plugin->requires  = 2017111300; // Moodle 3.4 release and upwards.
+$plugin->requires  = 2019052000; // Moodle 3.7 release and upwards.
 $plugin->component = 'local_codechecker';