YOURLS/includes/version.php

<?php
/**
 * YOURLS version
 *
 * Must be one of the following :
 *    MAJOR.MINOR (eg 1.8)
 *    MAJOR.MINOR.PATCH (1.8.1)
 *    MAJOR.MINOR-SOMETHING (1.8-dev)
 *    MAJOR.MINOR.PATCH-SOMETHING (1.8.1-donotuse)
 *
 */
define( 'YOURLS_VERSION', '1.10.2-dev' );

/**
 * YOURLS DB version. Increments when changes are made to the DB schema, to trigger a DB update
 *
 * Must be a string of an integer.
 *
 */
define( 'YOURLS_DB_VERSION', '506' );