diff --git a/apps/theming/templates/settings-admin.php b/apps/theming/templates/settings-admin.php
index aebf24a43bd..d38ca0fc44c 100644
--- a/apps/theming/templates/settings-admin.php
+++ b/apps/theming/templates/settings-admin.php
@@ -136,7 +136,7 @@ style('theming', 'settings-admin');
 	<div class="theming-hints">
 		<?php if (!$_['canThemeIcons']) { ?>
 			<p class="info">
-				<a href="<?php p($_['iconDocs']); ?> target="_blank">
+				<a href="<?php p($_['iconDocs']); ?> target="_blank" rel="noreferrer noopener">
 					<em>
 						<?php p($l->t('Install the Imagemagick PHP extension with support for SVG images to automatically generate favicons based on the uploaded logo and color.')); ?> ↗
 					</em>