diff --git a/src/BusProNet/ApiClient.php b/src/BusProNet/ApiClient.php
index 21db8dc..f1f254e 100644
--- a/src/BusProNet/ApiClient.php
+++ b/src/BusProNet/ApiClient.php
@@ -104,8 +104,12 @@ class ApiClient
      * @throws ApiClientException
      * @throws ResponseParserException
      */
-    public function updatePersonalData(string $email, string $password, PersonalData $personalData): Notification|PersonalData
-    {
+    public function updatePersonalData(
+        string $email,
+        string $password,
+        PersonalData $personalData,
+        bool $debug
+    ): Notification|PersonalData {
         $data = [
             'user' => $this->config['bpn_username'],
             'key' => $this->createKey($this->config['bpn_username'], $this->config['bpn_password'], static::TYPE_CUSTOMER_DATA),
@@ -117,7 +121,7 @@ class ApiClient
             'adressdaten' => $personalData->toPayload(),
         ];
 
-        return $this->sendRequest(static::TYPE_CUSTOMER_DATA, $data);
+        return $this->sendRequest(static::TYPE_CUSTOMER_DATA, $data, $debug);
     }
 
     /**
@@ -180,7 +184,7 @@ class ApiClient
      * @throws ApiClientException
      * @throws ResponseParserException
      */
-    public function updateBooking(BookingData $formData): Notification|BookingUpdate
+    public function updateBooking(BookingData $formData, bool $debug = false): Notification|BookingUpdate
     {
         $payload = (new BookingDataProcessor())->createUpdateRequestPayload($formData);
 
@@ -192,7 +196,7 @@ class ApiClient
             ...$payload,
         ];
 
-        return $this->sendRequest(static::TYPE_BOOKING_UPDATE, $data);
+        return $this->sendRequest(static::TYPE_BOOKING_UPDATE, $data, $debug);
     }
 
     /**
@@ -284,7 +288,7 @@ class ApiClient
      * @throws ApiClientException
      * @throws ResponseParserException
      */
-    private function sendRequest(string $type, array $data): mixed
+    private function sendRequest(string $type, array $data, bool $debug = false): mixed
     {
         $requestId = date(DATE_ATOM).uniqid();
 
@@ -300,7 +304,7 @@ class ApiClient
             'requestId' => $requestId,
         ]);
 
-        if (true === $this->config['debug']) {
+        if (true === $debug || true === $this->config['debug']) {
             $this->dumpXmlToFile('request', $requestId, $body);
         }
 
@@ -316,7 +320,7 @@ class ApiClient
         // message length (10 bytes) is prepended to actual message
         $xml = substr($response, 10);
 
-        if (true === $this->config['debug']) {
+        if (true === $debug || true === $this->config['debug']) {
             $this->dumpXmlToFile('response', $requestId, $xml);
         }