diff --git a/src/Worker/ContactDiscoveryForUser.php b/src/Worker/ContactDiscoveryForUser.php
index 9fc71b3223..22eb053df6 100644
--- a/src/Worker/ContactDiscoveryForUser.php
+++ b/src/Worker/ContactDiscoveryForUser.php
@@ -13,7 +13,6 @@ class ContactDiscoveryForUser
 {
 	/**
 	 * Discover contact relations
-	 * @param string $url
 	 */
 	public static function execute(int $uid)
 	{
diff --git a/src/Worker/Notifier.php b/src/Worker/Notifier.php
index 42868e4e0e..7681daf4a5 100644
--- a/src/Worker/Notifier.php
+++ b/src/Worker/Notifier.php
@@ -7,6 +7,7 @@
 
 namespace Friendica\Worker;
 
+use Exception;
 use Friendica\Core\Hook;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
@@ -21,6 +22,7 @@ use Friendica\Model\Item;
 use Friendica\Model\Post;
 use Friendica\Model\Tag;
 use Friendica\Model\User;
+use Friendica\Network\HTTPException\InternalServerErrorException;
 use Friendica\Protocol\Activity;
 use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\ActivityPub\Transmitter;
diff --git a/src/Worker/UpdateServerPeers.php b/src/Worker/UpdateServerPeers.php
index 9c5cce731b..94e04a240d 100644
--- a/src/Worker/UpdateServerPeers.php
+++ b/src/Worker/UpdateServerPeers.php
@@ -23,7 +23,7 @@ class UpdateServerPeers
 	/**
 	 * Query the given server for their known peers
 	 *
-	 * @param string $gserver Server URL
+	 * @param string $url Server URL
 	 * @return void
 	 */
 	public static function execute(string $url)