diff --git a/theme/boost/templates/navbar.mustache b/theme/boost/templates/navbar.mustache
index 653627166d782..281288d7a5bc5 100644
--- a/theme/boost/templates/navbar.mustache
+++ b/theme/boost/templates/navbar.mustache
@@ -82,7 +82,7 @@
             {{{ output.page_heading_menu }}}
         </ul>
 
-        <div id="usernavigation" class="navbar-nav ms-auto">
+        <div id="usernavigation" class="navbar-nav ms-auto h-100">
             {{# output.search_box }}
                 {{{ output.search_box }}}
                 <div class="divider border-start h-75 align-self-center mx-1"></div>