The PHP.net site has posted an announcement about the latest language release in the PHP 7.1.x series: PHP 7.1.8:

The PHP development team announces the immediate availability of PHP 7.1.8. This is a bugfix release, with several bug fixes included. All PHP 7.1 users are encouraged to upgrade to this version.

Fixes in this release include changes in DateTime handling, OpenSSL, PDO, SQLite3 and Opcache fixes. As always you can download this latest release from the main downloads page (source) or from windows.php.net for the Windows executables. You can view the full list of the changes in this release and their related bugs in the complete Changelog.