diff --git a/src/Endpoint/Webhooks/UpdateExistingWebhookRequest/UpdateExistingWebhookRequest/Data.php b/src/Endpoint/Webhooks/UpdateExistingWebhookRequest/UpdateExistingWebhookRequest/Data.php
index 065b6ae8..45717acd 100644
--- a/src/Endpoint/Webhooks/UpdateExistingWebhookRequest/UpdateExistingWebhookRequest/Data.php
+++ b/src/Endpoint/Webhooks/UpdateExistingWebhookRequest/UpdateExistingWebhookRequest/Data.php
@@ -6,14 +6,14 @@
 
 class Data extends Entity
 {
-    protected string $url;
+    protected ?string $url;
 
-    public function getUrl(): string
+    public function getUrl(): ?string
     {
         return $this->url;
     }
 
-    public function setUrl(string $url): static
+    public function setUrl(?string $url): static
     {
         $this->url = $url;
         return $this;