diff --git a/simuladormobout.php b/simuladormobout.php
index 6f339e7..91782f4 100644
--- a/simuladormobout.php
+++ b/simuladormobout.php
@@ -216,6 +216,8 @@ function outras_brafitec($es, $ms, $est, $apy, $acy, $cy, $ly, $ry, $ea, $pa, $c
 
 function simulador_mob_shortcode() {
 
+\wp_enqueue_script( 'mathjax' );
+
 if ($_SERVER['REQUEST_METHOD'] == 'POST'){
     //var_dump($_POST);
     if (isset($_POST["calcular"])) {
@@ -653,8 +655,6 @@ foreach ($sie_niveis as $sie_rotulo => $sie_valor) {
 </div>
 </div>
 
-<script type="text/javascript" async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/MathJax.js?config=TeX-MML-AM_CHTML"></script>
-
 <script type="text/javascript">
 function start() {
     var inputReproRec = document.querySelector("#repro_rec");
@@ -724,4 +724,17 @@ start();
     return ob_get_clean();
 }
 
+function register_assets() {
+    // MathJax 3 renderiza as formulas $$...$$. Registrado aqui e carregado via
+    // wp_enqueue_script() so quando o shortcode aparece na pagina; no rodape e async.
+    \wp_register_script(
+        'mathjax',
+        'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js',
+        array(),
+        '3',
+        array( 'in_footer' => true, 'strategy' => 'async' )
+    );
+}
+\add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\\register_assets' );
+
 \add_shortcode( 'simulador_mob', __NAMESPACE__ . '\\simulador_mob_shortcode' );