diff --git a/views/bootstrap4/class.Bootstrap4.php b/views/bootstrap4/class.Bootstrap4.php
index 7b86467f0..70ba92521 100644
--- a/views/bootstrap4/class.Bootstrap4.php
+++ b/views/bootstrap4/class.Bootstrap4.php
@@ -3934,7 +3934,7 @@ $("body").on("click", "span.openpopupbox", function(e) {
 	public function printAccordion($title, $content, $open=false) { /* {{{ */
 		$id = substr(md5(uniqid()), 0, 4);
 ?>
-		<div class="accordion" id="accordion<?php echo $id; ?>">
+		<div class="accordion mb-4" id="accordion<?php echo $id; ?>">
 			<div class="card">
 				<div class="card-header" id="accordionheader<?php echo $id; ?>">
 				<a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion<?php echo $id; ?>" data-target="#collapse<?php echo $id; ?>"<?= $open ? ' aria-expanded="true"' : '' ?>>