diff --git a/lib/Db/TimelineQuery.php b/lib/Db/TimelineQuery.php
index 21a61739..997428dd 100644
--- a/lib/Db/TimelineQuery.php
+++ b/lib/Db/TimelineQuery.php
@@ -33,7 +33,7 @@ class TimelineQuery {
      */
     public function getDays(
         IConfig &$config,
-        string &$user): array {
+        string $user): array {
 
         $sql = 'SELECT `*PREFIX*memories`.`dayid`, COUNT(`*PREFIX*memories`.`fileid`) AS count
                 FROM `*PREFIX*memories`
@@ -92,8 +92,8 @@ class TimelineQuery {
      */
     public function getDay(
         IConfig &$config,
-        string &$user,
-        int &$dayId): array {
+        string $user,
+        int $dayId): array {
 
         $sql = 'SELECT `*PREFIX*memories`.`fileid`, *PREFIX*filecache.etag, `*PREFIX*memories`.`isvideo`
                 FROM *PREFIX*memories
diff --git a/lib/Util.php b/lib/Util.php
index 542d2c97..215775cd 100644
--- a/lib/Util.php
+++ b/lib/Util.php
@@ -12,7 +12,7 @@ class Util {
      * @param IConfig $config
      * @param string $userId
      */
-    public static function getPhotosPath(IConfig &$config, string &$userId) {
+    public static function getPhotosPath(IConfig &$config, string $userId) {
         $p = $config->getUserValue($userId, Application::APPNAME, 'timelinePath', '');
         if (empty($p)) {
             return '/Photos/';