downgrade jQuery on wordpress

functions.php

<?php
// Downgrade to jQuery given version
function downgrade_jquery() {
  global $wp_scripts;
 
  // We want to use version 1.8.3 of jQuery, but it may break something in the admin so we only load it on the actual site.
  if ( !is_admin() ) :
    wp_deregister_script('jquery');
    wp_register_script('jquery', '//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js', false, '1.8.2');
  endif;
}
add_action( 'wp_head', downgrade_jquery() );