diff --git a/src/Event/ActionEventEmitter.php b/src/Event/ActionEventEmitter.php
index bde1277..50bfff6 100644
--- a/src/Event/ActionEventEmitter.php
+++ b/src/Event/ActionEventEmitter.php
@@ -26,7 +26,7 @@ interface ActionEventEmitter
      *
      * @return ActionEvent that can be triggered by the ActionEventEmitter
      */
-    public function getNewActionEvent(string $name = null, $target = null, $params = null): ActionEvent;
+    public function getNewActionEvent(?string $name = null, $target = null, $params = null): ActionEvent;
 
     public function dispatch(ActionEvent $event): void;
 
diff --git a/src/Event/ProophActionEventEmitter.php b/src/Event/ProophActionEventEmitter.php
index bb5bb7d..0e0bd4f 100644
--- a/src/Event/ProophActionEventEmitter.php
+++ b/src/Event/ProophActionEventEmitter.php
@@ -42,7 +42,7 @@ public function __construct(array $availableEventNames = [])
      *
      * @return ActionEvent that can be triggered by the ActionEventEmitter
      */
-    public function getNewActionEvent(string $name = null, $target = null, $params = null): ActionEvent
+    public function getNewActionEvent(?string $name = null, $target = null, $params = null): ActionEvent
     {
         if ($name === null) {
             $name = 'action_event';