We are happy to announce the availability of the next stable release, Serendipity 2.4.0, providing primarily the needed support for PHP 8.0.
Please see the release announcement here: https://blog.s9y.org/archives/293-Seren ... eased.html.
Keep the included upgrade notes in mind: Deactivate serendipity_plugin_comments and use at least PHP 7.3.
You can download the release file and unzip it to your installation as usual, or you may use the auto-updater.