diff --git a/apps/updatenotification/lib/Settings/Admin.php b/apps/updatenotification/lib/Settings/Admin.php
index 897b2555ad..54adf55822 100644
--- a/apps/updatenotification/lib/Settings/Admin.php
+++ b/apps/updatenotification/lib/Settings/Admin.php
@@ -114,7 +114,7 @@ class Admin implements ISettings {
 		return new TemplateResponse('updatenotification', 'admin', $params, '');
 	}
 
-	protected function filterChanges(array $changes) {
+	protected function filterChanges(array $changes): array {
 		$filtered = [];
 		if(isset($changes['changelogURL'])) {
 			$filtered['changelogURL'] = $changes['changelogURL'];
diff --git a/core/css/whatsnew.scss b/core/css/whatsnew.scss
index e13cdf8625..99d99ded69 100644
--- a/core/css/whatsnew.scss
+++ b/core/css/whatsnew.scss
@@ -9,6 +9,7 @@
   bottom: 35px !important;
   left: 15px !important;
   width: 270px;
+  z-index: 700;
 }
 
 .whatsNewPopover p {