diff --git a/Classes/Http/SessionLockRequestComponent.php b/Classes/Http/SessionLockRequestComponent.php
index 5b59d42..691c95b 100644
--- a/Classes/Http/SessionLockRequestComponent.php
+++ b/Classes/Http/SessionLockRequestComponent.php
@@ -46,7 +46,7 @@ class SessionLockRequestComponent implements ComponentInterface
     /**
      * @inheritDoc
      */
-    public function handle(ComponentContext $componentContext)
+    public function handle(ComponentContext $componentContext): void
     {
         $sessionCookieName = $this->sessionSettings['name'];