diff --git a/lib/private/Command/ClosureJob.php b/lib/private/Command/ClosureJob.php
index 58fe9696437da..0d9ee1adddbb9 100644
--- a/lib/private/Command/ClosureJob.php
+++ b/lib/private/Command/ClosureJob.php
@@ -12,7 +12,7 @@
 
 class ClosureJob extends QueuedJob {
 	protected function run($argument) {
-		$callable = unserialize($argument, [LaravelClosure::class]);
+		$callable = unserialize($argument, ['allowed_classes' => [LaravelClosure::class]]);
 		$callable = $callable->getClosure();
 		if (is_callable($callable)) {
 			$callable();