diff --git a/3rdparty b/3rdparty
index 90a8336c3b..4466d782fa 160000
--- a/3rdparty
+++ b/3rdparty
@@ -1 +1 @@
-Subproject commit 90a8336c3b51a3be5869569ef8e84949a1e67608
+Subproject commit 4466d782fafe2b53f3839156d10be0d3eacb47d6
diff --git a/lib/public/EventDispatcher/Event.php b/lib/public/EventDispatcher/Event.php
index 8e6a5217af..b07efba0f1 100644
--- a/lib/public/EventDispatcher/Event.php
+++ b/lib/public/EventDispatcher/Event.php
@@ -26,7 +26,7 @@ declare(strict_types=1);
 
 namespace OCP\EventDispatcher;
 
-use Symfony\Contracts\EventDispatcher\Event as SymfonyEvent;
+use Psr\EventDispatcher\StoppableEventInterface;
 
 /**
  * Base event class for the event dispatcher service
@@ -34,9 +34,21 @@ use Symfony\Contracts\EventDispatcher\Event as SymfonyEvent;
  * Typically this class isn't instantiated directly but sub classed for specific
  * event types
  *
+ * This class extended \Symfony\Contracts\EventDispatcher\Event until 21.0, since
+ * 22.0.0 this class directly implements the PSR StoppableEventInterface and no
+ * longer relies on Symfony. This transition does not come with any changes in API,
+ * the class has the same methods and behavior before and after this change.
+ *
  * @since 17.0.0
  */
-class Event extends SymfonyEvent {
+class Event implements StoppableEventInterface {
+
+	/**
+	 * @var bool
+	 *
+	 * @since 22.0.0
+	 */
+	private $propagationStopped = false;
 
 	/**
 	 * Compatibility constructor
@@ -51,4 +63,25 @@ class Event extends SymfonyEvent {
 	 */
 	public function __construct() {
 	}
+
+	/**
+	 * Stops the propagation of the event to further event listeners
+	 *
+	 * @return void
+	 *
+	 * @since 22.0.0
+	 */
+	public function stopPropagation(): void {
+		$this->propagationStopped = true;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 *
+	 * @since 22.0.0
+	 * @see \Psr\EventDispatcher\StoppableEventInterface
+	 */
+	public function isPropagationStopped(): bool {
+		return $this->propagationStopped;
+	}
 }