diff --git a/components.html b/components.html
index 00a9a71..d98935c 100644
--- a/components.html
+++ b/components.html
@@ -493,8 +493,11 @@ <h1>Mensagens</h1>
           <div class="code-block html">
             <code class="tx">&lt;!-- Exemplo de .dropdown estilizado como um .btn, com lista alinhada à direita. --&gt;</code>
             <pre>
-<code><span class="el">&lt;</span>div <span class="attr">class</span><span class="el">=</span><span class="value">"msg success"</span><span class="el">&gt;</span></code>
-  <code><span class="el">&lt;</span>button <span class="attr">type</span><span class="el">=</span><span class="value">"button"</span> <span class="attr">class</span><span class="el">=</span><span class="value">"close"</span><span class="el">&gt;</span><span class="tx"></span><span class="el">&lt;/</span>button<span class="el">&gt;</span></code>
+<code><span class="el">&lt;</span>div <span class="attr">class</span><span class="el">=</span><span class="value">"msg success"</span>
+<span class="attr">role</span><span class="el">=</span><span class="value">"dialog"</span><span class="el">&gt;</span></code>
+  <code><span class="el">&lt;</span>button <span class="attr">type</span><span class="el">=</span><span class="value">"button"</span>
+  <span class="attr">class</span><span class="el">=</span><span class="value">"close"</span>
+  <span class="attr">aria-label</span><span class="el">=</span><span class="value">"Fechar"</span><span class="el">&gt;</span><span class="tx"></span><span class="el">&lt;/</span>button<span class="el">&gt;</span></code>
   <code><span class="el">&lt;</span>p<span class="el">&gt;</span><span class="tx">Exemplo de mensagem temporária.</span><span class="el">&lt;/</span>p<span class="el">&gt;</span></code>
 <code><span class="el">&lt;/</span>div<span class="el">&gt;</span></code>
             </pre>