Add this code in function.php file
// Disable Autoupdate add_filter( 'automatic_updater_disabled', '__return_true' ); function remove_core_updates(){ global $wp_version;return(object) array('last_checked'=> time(),'version_checked'=> $wp_version,); } add_filter('pre_site_transient_update_core','remove_core_updates'); add_filter('pre_site_transient_update_plugins','remove_core_updates'); add_filter('pre_site_transient_update_themes','remove_core_updates');