diff --git a/eopayment/saga.py b/eopayment/saga.py
index a23d261..4286cfc 100644
--- a/eopayment/saga.py
+++ b/eopayment/saga.py
@@ -193,7 +193,7 @@ class Payment(PaymentCommon):
             result=result,
             bank_status=bank_status,
             signed=True,
-            bank_data=response,
+            bank_data=dict(response),
             order_id=idop,
             transaction_id=idop,
             test=False)
diff --git a/tests/test_saga.py b/tests/test_saga.py
index a45d806..1671ec9 100644
--- a/tests/test_saga.py
+++ b/tests/test_saga.py
@@ -18,6 +18,8 @@
 
 from __future__ import print_function, unicode_literals
 
+import json
+
 import pytest
 
 import zeep.transports
@@ -92,4 +94,6 @@ def test_response(backend_factory):
         'transaction_date': None,
         'transaction_id': '28b52f40-1ace-11eb-8ce3-0213ad91a104',
     }
+    # Check bank_data is JSON serializable
+    json.dumps(response.bank_data)