diff --git a/xExtension-Webhook/configure.phtml b/xExtension-Webhook/configure.phtml
index d8161e8..36bab79 100644
--- a/xExtension-Webhook/configure.phtml
+++ b/xExtension-Webhook/configure.phtml
@@ -10,7 +10,7 @@ declare(strict_types=1);
 
 	<fieldset>
 		<legend><?= _t('ext.webhook.event_settings') ?> ⚙️</legend>
-		<details open>
+		<details open="open">
 			<summary class="stick"><small><?= _t('ext.webhook.show_hide') ?></small></summary>
 
 			<div class="form-group">
@@ -70,7 +70,7 @@ declare(strict_types=1);
 
 	<fieldset>
 		<legend><?= _t('ext.webhook.webhook_settings') ?> 🌐</legend>
-		<details open>
+		<details open="open">
 			<summary class="stick"> <small><?= _t('ext.webhook.show_hide') ?></small> </summary>
 
 			<div class="form-group">