diff --git a/README.md b/README.md
index 09e2668..fd51f8a 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,9 @@ Config parameters to operate the server in slave mode:
 
 // url of the master, so we can redirect the user back in case of an error
 'gss.master.url' => 'http://localhost/nextcloud2',
+
+// interval (in seconds) between lookup-server updates
+'gss.updatels.interval' => 86400,
 ````
 
 The Slave will always redirect not logged in user to the master to perform the login.
diff --git a/lib/BackgroundJobs/UpdateLookupServer.php b/lib/BackgroundJobs/UpdateLookupServer.php
index e629d3b..5dec946 100644
--- a/lib/BackgroundJobs/UpdateLookupServer.php
+++ b/lib/BackgroundJobs/UpdateLookupServer.php
@@ -29,18 +29,20 @@
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\BackgroundJob\IJob;
 use OCP\BackgroundJob\TimedJob;
+use OCP\IConfig;
 
 class UpdateLookupServer extends TimedJob {
 
 
 	public function __construct(
 		ITimeFactory $time,
+		IConfig $config,
 		private GlobalSiteSelector $globalSiteSelector,
 		private Slave $slave
 	) {
 		parent::__construct($time);
 
-		$this->setInterval(86400);
+		$this->setInterval($config->getSystemValueInt('gss.updatels.interval', 86400));
 		$this->setTimeSensitivity(IJob::TIME_SENSITIVE);
 	}