diff --git a/src/Module/Notifications/Ping.php b/src/Module/Notifications/Ping.php
index 2cbe191db2..998e0929ee 100644
--- a/src/Module/Notifications/Ping.php
+++ b/src/Module/Notifications/Ping.php
@@ -28,17 +28,14 @@ use Friendica\Content\GroupManager;
 use Friendica\Core\Cache\Capability\ICanCache;
 use Friendica\Core\Cache\Enum\Duration;
 use Friendica\Core\Config\Capability\IManageConfigValues;
-use Friendica\Core\Hook;
 use Friendica\Core\L10n;
 use Friendica\Core\PConfig\Capability\IManagePersonalConfigValues;
 use Friendica\Core\Session\Capability\IHandleUserSessions;
 use Friendica\Database\Database;
-use Friendica\Database\DBA;
 use Friendica\Model\Circle;
 use Friendica\Model\Post;
 use Friendica\Model\User;
 use Friendica\Model\Verb;
-use Friendica\Module\Conversation\Network;
 use Friendica\Module\Register;
 use Friendica\Module\Response;
 use Friendica\Navigation\Notifications\Entity;
diff --git a/src/Module/Ping/Network.php b/src/Module/Ping/Network.php
index cf6706370e..3326d8a0af 100644
--- a/src/Module/Ping/Network.php
+++ b/src/Module/Ping/Network.php
@@ -21,11 +21,43 @@
 
 namespace Friendica\Module\Ping;
 
+use Friendica\App;
+use Friendica\App\Mode;
+use Friendica\Content\Conversation;
+use Friendica\Content\Conversation\Factory\Timeline as TimelineFactory;
+use Friendica\Content\Conversation\Repository\UserDefinedChannel;
+use Friendica\Content\Conversation\Factory\Channel as ChannelFactory;
+use Friendica\Content\Conversation\Factory\UserDefinedChannel as UserDefinedChannelFactory;
+use Friendica\Content\Conversation\Factory\Community as CommunityFactory;
+use Friendica\Content\Conversation\Factory\Network as NetworkFactory;
+use Friendica\Core\Cache\Capability\ICanCache;
+use Friendica\Core\Config\Capability\IManageConfigValues;
+use Friendica\Core\L10n;
+use Friendica\Core\Lock\Capability\ICanLock;
+use Friendica\Core\PConfig\Capability\IManagePersonalConfigValues;
+use Friendica\Core\Session\Capability\IHandleUserSessions;
 use Friendica\Core\System;
+use Friendica\Database\Database;
 use Friendica\Module\Conversation\Network as NetworkModule;
+use Friendica\Module\Response;
+use Friendica\Navigation\SystemMessages;
+use Friendica\Util\Profiler;
+use Psr\Log\LoggerInterface;
 
 class Network extends NetworkModule
 {
+	/**
+	 * @var ICanLock
+	 */
+	private $lock;
+
+	public function __construct(ICanLock $lock, UserDefinedChannelFactory $userDefinedChannel, NetworkFactory $network, CommunityFactory $community, ChannelFactory $channelFactory, UserDefinedChannel $channel, App $app, TimelineFactory $timeline, SystemMessages $systemMessages, Mode $mode, Conversation $conversation, App\Page $page, IHandleUserSessions $session, Database $database, IManagePersonalConfigValues $pConfig, IManageConfigValues $config, ICanCache $cache, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
+	{
+		parent::__construct($userDefinedChannel, $network, $community, $channelFactory, $channel, $app, $timeline, $systemMessages, $mode, $conversation, $page, $session, $database, $pConfig, $config, $cache, $l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
+
+		$this->lock = $lock;
+	}
+
 	protected function rawContent(array $request = [])
 	{
 		if (!$this->session->getLocalUserId()) {
@@ -46,6 +78,12 @@ class Network extends NetworkModule
 			System::httpExit('');
 		}
 
+		$lockkey = 'network-ping-' . $this->session->getLocalUserId();
+		if (!$this->lock->acquire($lockkey, 0)) {
+			$this->logger->debug('Ping-1-lock', ['uid' => $this->session->getLocalUserId()]);
+			System::httpExit('');
+		}
+
 		$this->setPing(true);
 		$this->itemsPerPage = 100;
 
@@ -56,6 +94,7 @@ class Network extends NetworkModule
 		} else {
 			$items = $this->getItems();
 		}
+		$this->lock->release($lockkey);
 		$count = count($items);
 		System::httpExit(($count < 100) ? $count : '99+');
 	}