diff --git a/ChangeLog-12.3.md b/ChangeLog-12.3.md
index d1c9980bfec8f7b839212c371eaccbdce5d6ae07..4dbea8d21c73c17d9b9c5a36e78ed5b067e0512c 100644
--- a/ChangeLog-12.3.md
+++ b/ChangeLog-12.3.md
@@ -2,10 +2,18 @@
 
 All notable changes are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## [12.3.1] - 2025-06-18
+
+### Changed
+
+* Changed CSS for HTML report to not use common ligatures as this sometimes lead to hard-to-read code
+* Updated Bootstrap to version 5.3.6 for HTML report
+
 ## [12.3.0] - 2025-05-23
 
 ### Changed
 
 * [#1080](https://github.com/sebastianbergmann/php-code-coverage/pull/1080): Support for reporting code coverage information in OpenClover XML format; unlike the existing Clover XML reporter, which remains unchanged, the XML documents generated by this new reporter validate against the OpenClover project's XML schema definition, with one exception: we do not generate the `<testproject>` element. This feature is experimental and the generated XML might change in order to improve compliance with the OpenClover project's XML schema definition further. Such changes will be made in bugfix and/or minor releases even if they break backward compatibility.
 
+[12.3.1]: https://github.com/sebastianbergmann/php-code-coverage/compare/12.3.0...12.3.1
 [12.3.0]: https://github.com/sebastianbergmann/php-code-coverage/compare/12.2.1...12.3.0
diff --git a/src/Version.php b/src/Version.php
index 790dbcfbd1d17ff215bc6a69366d6bdaed336570..69baec3e16aa5eb9bd5c7e22308763b150386e00 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -19,7 +19,7 @@ final class Version
     public static function id(): string
     {
         if (self::$version === '') {
-            self::$version = (new VersionId('12.3.0', dirname(__DIR__)))->asString();
+            self::$version = (new VersionId('12.3.1', dirname(__DIR__)))->asString();
         }
 
         return self::$version;