diff --git a/build/index.asset.php b/build/index.asset.php
index f0b4d72..6601343 100644
--- a/build/index.asset.php
+++ b/build/index.asset.php
@@ -1 +1 @@
-<?php return array('dependencies' => array('wp-block-editor', 'wp-blocks', 'wp-components', 'wp-data', 'wp-editor', 'wp-element', 'wp-i18n', 'wp-primitives', 'wp-server-side-render'), 'version' => 'befba07e6fc7d1864274');
+<?php return array('dependencies' => array('wp-block-editor', 'wp-blocks', 'wp-components', 'wp-data', 'wp-editor', 'wp-element', 'wp-i18n', 'wp-primitives', 'wp-server-side-render'), 'version' => '4fa2c503062f786b6b8e');
diff --git a/build/index.css b/build/index.css
index 17ac4d6..9797a6c 100644
--- a/build/index.css
+++ b/build/index.css
@@ -1,2 +1,2 @@
 .wp-block-simpletoc-toc .components-notice{background-color:#fef8ee;color:#333;font-size:13px;margin:1em}.wp-block-simpletoc-toc .components-notice span{padding-left:5px}
-.simpletoc{margin-bottom:1em}.wp-block-simpletoc-toc h2{margin:0}.simpletoc-collapsible{background-color:#eee;border:none;color:#444;cursor:pointer;font-size:18px;outline:none;padding:18px;text-align:left;width:100%}.simpletoc .active,.simpletoc-collapsible:hover{background-color:#ddd}.simpletoc-collapsible:after{content:"\02795";float:right;font-size:13px;margin-left:5px}.simpletoc .active:after{content:"\2796"}.simpletoc-content{background-color:#f1f1f1;display:none;overflow:hidden;padding:14px 18px 0}
+.simpletoc{margin-bottom:1em}.simpletoc-collapsible{background-color:#eee;border:none;color:#444;cursor:pointer;font-size:18px;outline:none;padding:18px;text-align:left;width:100%}.simpletoc .active,.simpletoc-collapsible:hover{background-color:#ddd}.simpletoc-collapsible:after{content:"\02795";float:right;font-size:13px;margin-left:5px}.simpletoc .active:after{content:"\2796"}.simpletoc-content{background-color:#f1f1f1;display:none;overflow:hidden;padding:14px 18px 0}
diff --git a/plugin.php b/plugin.php
index 6e9c010..2321cd1 100644
--- a/plugin.php
+++ b/plugin.php
@@ -618,7 +618,7 @@ function add_accordion_start($html, $attributes, $itemcount, $alignclass)
     if ($isAccordionEnabled) {
         enqueue_accordion_frontend();
         $titleText = esc_html(trim($attributes['title_text'])) ?: __('Table of Contents', 'simpletoc');
-        $accordionStart = '<h2><button type="button" aria-expanded="false" aria-controls="simpletoc-content-container" class="simpletoc-collapsible">' . $titleText . '</button></h2><div class="simpletoc-content">';
+        $accordionStart = '<h2 style="margin: 0;"><button type="button" aria-expanded="false" aria-controls="simpletoc-content-container" class="simpletoc-collapsible">' . $titleText . '</button></h2><div class="simpletoc-content">';
         $accordionEnd = '</div>';
     }
 
diff --git a/src/accordion.css b/src/accordion.css
index 541665b..69ea428 100644
--- a/src/accordion.css
+++ b/src/accordion.css
@@ -2,10 +2,6 @@
 	margin-bottom: 1em;
 }
 
-.wp-block-simpletoc-toc h2 {
-	margin: 0;
-}
-
 .simpletoc-collapsible {
 	background-color: #eee;
 	color: #444;