diff --git a/typo3/sysext/rte_ckeditor/Classes/Controller/BrowseLinksController.php b/typo3/sysext/rte_ckeditor/Classes/Controller/BrowseLinksController.php
index 9e9ae44dc9b8f092ee3876f1a6bd1d9ada15b02d..6ed304c70c1da96945a679e47f449c0fbf7e5f18 100644
--- a/typo3/sysext/rte_ckeditor/Classes/Controller/BrowseLinksController.php
+++ b/typo3/sysext/rte_ckeditor/Classes/Controller/BrowseLinksController.php
@@ -541,7 +541,7 @@ class BrowseLinksController extends AbstractLinkBrowserController
      *
      * @return array Array of parameters which have to be added to URLs
      */
-    public function getUrlParameters(array $overrides = null)
+    public function getUrlParameters(?array $overrides = null)
     {
         return [
             'act' => $overrides['act'] ?? $this->displayedLinkHandlerId,
diff --git a/typo3/sysext/rte_ckeditor/Classes/Form/Element/RichTextElement.php b/typo3/sysext/rte_ckeditor/Classes/Form/Element/RichTextElement.php
index 7b65c2ce944cf9d4d3dbe706c7f229b0704e2a7b..7f4634f5f11fb19d4526a257b495460e463f68ec 100644
--- a/typo3/sysext/rte_ckeditor/Classes/Form/Element/RichTextElement.php
+++ b/typo3/sysext/rte_ckeditor/Classes/Form/Element/RichTextElement.php
@@ -91,7 +91,7 @@ class RichTextElement extends AbstractFormElement
      * @param array $data
      * @param EventDispatcherInterface|null $eventDispatcher
      */
-    public function __construct(NodeFactory $nodeFactory, array $data, EventDispatcherInterface $eventDispatcher = null)
+    public function __construct(NodeFactory $nodeFactory, array $data, ?EventDispatcherInterface $eventDispatcher = null)
     {
         parent::__construct($nodeFactory, $data);
         $this->eventDispatcher = $eventDispatcher ?? GeneralUtility::makeInstance(EventDispatcherInterface::class);