diff --git a/src/Models/BankSource.php b/src/Models/BankSource.php
index 597e66a..366cb5c 100644
--- a/src/Models/BankSource.php
+++ b/src/Models/BankSource.php
@@ -222,7 +222,7 @@ class BankSource
             'buchungstext_template_debit', 'buchungstext_template_credit',
             'sandbox', 'last_fetched_at', 'fetch_range',
             'app_name', 'client_id_enc', 'secret_enc',
-            'blz', 'fints_url', 'benutzerkennung', 'pin_enc', 'account_filter',
+            'blz', 'fints_url', 'benutzerkennung', 'pin_enc', 'account_filter', 'tan_mode_id',
         ];
 
         $out = [];