diff --git a/src/controllers/menu_controller.js b/src/controllers/menu_controller.js
index a049199..6843a09 100644
--- a/src/controllers/menu_controller.js
+++ b/src/controllers/menu_controller.js
@@ -233,7 +233,7 @@ export default class extends Controller {
         mainNode.innerHTML = html`
             <span class="fs-5 fw-bold">${ontology.ontology}</span>
         `;
-        mainNode.classList.add('border-bottom', 'pb-3');
+        mainNode.classList.add('pb-3');
 
         let domainList = document.createElement('div');