diff --git a/public/index.html b/public/index.html
index ad119cd..5de7a32 100644
--- a/public/index.html
+++ b/public/index.html
@@ -912,7 +912,7 @@
         <h3 style="display: flex; align-items: center; gap: 8px; font-family: 'Outfit', sans-serif;">🧠 Planejador de Aulas Mind Lab</h3>
         <div style="display: flex; gap: 10px; align-items: center;">
           <button id="btnOpenMindLabHistory" class="btn-secondary" style="padding: 6px 12px; font-size: 0.85rem; border-radius: 6px; display: flex; align-items: center; gap: 6px; background: rgba(139, 92, 246, 0.1); color: #a78bfa; border: 1px solid rgba(139, 92, 246, 0.2);">
-            <span class="material-icons" style="font-size: 14px;">history</span> Histórico
+            🕒 Histórico
           </button>
           <button id="btnCloseMindLabModal" class="btn-close-modal" style="background: none; border: none; color: var(--text-secondary); cursor: pointer; font-size: 1.5rem;">&times;</button>
         </div>