Setting the height of wysiwyg

functions.php

add_action('acf/input/admin_head', 'lh_acf_admin_head'); 
function lh_acf_admin_head() {
        ?>
        <style type="text/css">

        .acf-editor-wrap iframe {
            height: 150px !important;
            min-height: 150px;
        }
        .acf-editor-wrap .mce-fullscreen iframe{
            height: 700px !important;
            min-height: 700px;
        }

        </style>
        <?php
}