diff --git a/index.html b/index.html
index 6a4b786..92d7b2a 100644
--- a/index.html
+++ b/index.html
@@ -104,7 +104,7 @@ <h1 class="c-title">Fazer login</h1>
             </fieldset>
 
             <div class="l-submit-button-container">
-                <button type="submit" class="c-btn c-btn--submit" aria-disabled="true">
+                <button type="submit" class="c-btn c-btn--submit js-btn-submit" aria-disabled="true">
                     <svg aria-hidden="true" class="icon" width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                         <path d="M12.1648 16.32L16.2544 12.16L12.1648 8" stroke="currentcolor" stroke-width="1.5" stroke-linecap="round"/>
                         <path d="M7 12H15.4576" stroke="currentcolor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>