diff --git a/src/BusProNet/ApiClient.php b/src/BusProNet/ApiClient.php
index f1f254e..b75b918 100644
--- a/src/BusProNet/ApiClient.php
+++ b/src/BusProNet/ApiClient.php
@@ -108,7 +108,7 @@ class ApiClient
         string $email,
         string $password,
         PersonalData $personalData,
-        bool $debug
+        bool $debug = false
     ): Notification|PersonalData {
         $data = [
             'user' => $this->config['bpn_username'],