diff --git a/src/V2/ClientOptions/BaseParameters.php b/src/V2/ClientOptions/BaseParameters.php
index 4b4a8465..65624e5d 100644
--- a/src/V2/ClientOptions/BaseParameters.php
+++ b/src/V2/ClientOptions/BaseParameters.php
@@ -71,7 +71,7 @@ public function asHash(): array
                 $outHash['webhook_ids'] = $this->webhooksIds[0];
             } else {
                 foreach ($this->webhooksIds as $webhookId) {
-                    $outHash['webhook_ids[]'] = $webhookId;
+                    $outHash['webhook_ids'][] = $webhookId;
                 }
             }
         }