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+---
+title: 426 Upgrade Required
+slug: Web/HTTP/Status/426
+translation_of: Web/HTTP/Status/426
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>O status HTTP <code><strong>426 Upgrade Required</strong></code> indica que o servidor recusa o processamento da requisição usando o protocolo atual mas poderá ser processado caso o cliente atualize para um protocolo diferente.</p>
+
+<p>O servidor envia uma header {{HTTPHeader("Upgrade")}} com esta resposta para indicar qual o protocolo necessário.</p>
+
+<h2 id="Status">Status</h2>
+
+<pre class="syntaxbox">426 Upgrade Required</pre>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<pre>HTTP/1.1 426 Upgrade Required
+Upgrade: HTTP/2.0
+Connection: Upgrade
+Content-Length: 53
+Content-Type: text/plain
+
+This service requires use of the HTTP/2.0 protocol</pre>
+
+<h2 id="Especificações">Especificações</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Especificação</th>
+   <th scope="col">Título</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{RFC("7231", "426 Upgrade Required" , "6.5.15")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Ver_também">Ver também</h2>
+
+<ul>
+ <li>{{HTTPHeader("Upgrade")}}</li>
+ <li>{{HTTPStatus("101")}} <code>Switching Protocol</code></li>
+</ul>