diff --git a/resources/cassettes/test_bill_create.yaml b/resources/cassettes/test_bill_create.yaml
new file mode 100644
index 0000000..fbf42f4
--- /dev/null
+++ b/resources/cassettes/test_bill_create.yaml
@@ -0,0 +1,36 @@
+interactions:
+- request:
+    body: '{"customer_id": 2481258, "code": "my-first-bill", "installments": 1, "payment_method_code":
+      "credit_card", "bill_items": [{"product_code": "product-1", "amount": 100.0}],
+      "payment_profile": {"id": 2284520}}'
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Connection: [keep-alive]
+      Content-Length: ['206']
+      Content-Type: [application/json]
+      User-Agent: [python-requests/2.13.0]
+    method: POST
+    uri: https://app.vindi.com.br/api/v1/bills
+  response:
+    body: {string: "{\"bill\":{\"id\":7064381,\"code\":\"my-first-bill\",\"amount\":\"100.0\",\"installments\":1,\"status\":\"pending\",\"seen_at\":null,\"billing_at\":null,\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"url\":\"https://app.vindi.com.br/customer/bills/7064381?token=db96ea6a-561f-44ab-a040-b0909c739564\",\"created_at\":\"2017-04-21T09:18:55.000-03:00\",\"updated_at\":\"2017-04-21T09:18:56.000-03:00\",\"bill_items\":[{\"id\":8362517,\"amount\":\"100.0\",\"quantity\":null,\"pricing_range_id\":null,\"description\":null,\"pricing_schema\":null,\"product\":{\"id\":82534,\"name\":\"Product
+        1\",\"code\":\"product-1\"},\"product_item\":null,\"discount\":null}],\"charges\":[{\"id\":6803582,\"amount\":\"100.0\",\"status\":\"pending\",\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"paid_at\":null,\"installments\":1,\"attempt_count\":0,\"next_attempt\":null,\"print_url\":null,\"created_at\":\"2017-04-21T09:18:56.000-03:00\",\"updated_at\":\"2017-04-21T09:18:56.000-03:00\",\"last_transaction\":null,\"payment_method\":{\"id\":17293,\"public_name\":\"Cart\xE3o
+        de cr\xE9dito\",\"name\":\"Cart\xE3o de cr\xE9dito\",\"code\":\"credit_card\",\"type\":\"PaymentMethod::CreditCard\"}}],\"customer\":{\"id\":2481258,\"name\":\"John
+        Doe\",\"email\":\"john@doe.com\",\"code\":null},\"period\":null,\"subscription\":null,\"metadata\":{},\"payment_profile\":{\"id\":2284520,\"holder_name\":\"JOHN
+        DOE\",\"registry_code\":null,\"bank_branch\":null,\"bank_account\":null,\"card_expiration\":\"2020-12-31T23:59:59.000-02:00\",\"card_number_first_six\":\"555555\",\"card_number_last_four\":\"5557\",\"token\":\"ba3cf5f2-143f-44df-b09e-0bc69dfb7a96\",\"created_at\":\"2017-04-20T08:59:01.000-03:00\",\"payment_company\":{\"id\":1,\"name\":\"MasterCard\",\"code\":\"mastercard\"}}}}"}
+    headers:
+      Cache-Control: ['max-age=0, private, must-revalidate']
+      Connection: [keep-alive]
+      Content-Length: ['1561']
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Fri, 21 Apr 2017 12:18:56 GMT']
+      ETag: [W/"4c7430bea9c7892cad07e10dbefd87cc"]
+      Rate-Limit-Limit: ['120']
+      Rate-Limit-Remaining: ['119']
+      Rate-Limit-Reset: ['1492777195']
+      Server: [nginx]
+      Vindi-Merchant-Id: ['5963']
+      X-Request-Id: [885764eb-c2f6-444d-b1ba-fbf217f9ec45]
+      X-Runtime: ['0.296408']
+    status: {code: 201, message: Created}
+version: 1
diff --git a/resources/cassettes/test_bill_destroy.yaml b/resources/cassettes/test_bill_destroy.yaml
new file mode 100644
index 0000000..a41d2c0
--- /dev/null
+++ b/resources/cassettes/test_bill_destroy.yaml
@@ -0,0 +1,34 @@
+interactions:
+- request:
+    body: null
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Connection: [keep-alive]
+      Content-Length: ['0']
+      Content-Type: [application/json]
+      User-Agent: [python-requests/2.13.0]
+    method: DELETE
+    uri: https://app.vindi.com.br/api/v1/bills/7071692
+  response:
+    body: {string: "{\"bill\":{\"id\":7071692,\"code\":\"my-third-bill\",\"amount\":\"0.0\",\"installments\":1,\"status\":\"canceled\",\"seen_at\":null,\"billing_at\":\"2017-04-21T00:00:00.000-03:00\",\"due_at\":\"2017-04-21T23:59:59.000-03:00\",\"url\":\"https://app.vindi.com.br/customer/bills/7071692?token=4acee607-f2b6-433a-8134-67be26553f97\",\"created_at\":\"2017-04-21T11:08:49.000-03:00\",\"updated_at\":\"2017-04-21T11:49:06.666-03:00\",\"bill_items\":[{\"id\":8371854,\"amount\":\"100.0\",\"quantity\":null,\"pricing_range_id\":null,\"description\":null,\"pricing_schema\":null,\"product\":{\"id\":82534,\"name\":\"Product
+        1\",\"code\":\"product-1\"},\"product_item\":null,\"discount\":null}],\"charges\":[{\"id\":6810651,\"amount\":\"100.0\",\"status\":\"canceled\",\"due_at\":\"2017-04-21T23:59:59.000-03:00\",\"paid_at\":null,\"installments\":1,\"attempt_count\":0,\"next_attempt\":null,\"print_url\":null,\"created_at\":\"2017-04-21T11:08:49.000-03:00\",\"updated_at\":\"2017-04-21T11:49:06.000-03:00\",\"last_transaction\":null,\"payment_method\":{\"id\":17293,\"public_name\":\"Cart\xE3o
+        de cr\xE9dito\",\"name\":\"Cart\xE3o de cr\xE9dito\",\"code\":\"credit_card\",\"type\":\"PaymentMethod::CreditCard\"}}],\"customer\":{\"id\":2481258,\"name\":\"John
+        Doe\",\"email\":\"john@doe.com\",\"code\":null},\"period\":null,\"subscription\":null,\"metadata\":{},\"payment_profile\":{\"id\":2284520,\"holder_name\":\"JOHN
+        DOE\",\"registry_code\":null,\"bank_branch\":null,\"bank_account\":null,\"card_expiration\":\"2020-12-31T23:59:59.000-02:00\",\"card_number_first_six\":\"555555\",\"card_number_last_four\":\"5557\",\"token\":\"ba3cf5f2-143f-44df-b09e-0bc69dfb7a96\",\"created_at\":\"2017-04-20T08:59:01.000-03:00\",\"payment_company\":{\"id\":1,\"name\":\"MasterCard\",\"code\":\"mastercard\"}}}}"}
+    headers:
+      Cache-Control: ['max-age=0, private, must-revalidate']
+      Connection: [keep-alive]
+      Content-Length: ['1588']
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Fri, 21 Apr 2017 14:49:06 GMT']
+      ETag: [W/"cd9afb6ea9fb00294280b967826cc5bd"]
+      Rate-Limit-Limit: ['120']
+      Rate-Limit-Remaining: ['118']
+      Rate-Limit-Reset: ['1492786149']
+      Server: [nginx]
+      Vindi-Merchant-Id: ['5963']
+      X-Request-Id: [fbe252be-cb20-4f66-b0bb-baf2ef04f1ac]
+      X-Runtime: ['0.112778']
+    status: {code: 200, message: OK}
+version: 1
diff --git a/resources/cassettes/test_bill_list.yaml b/resources/cassettes/test_bill_list.yaml
new file mode 100644
index 0000000..58b480a
--- /dev/null
+++ b/resources/cassettes/test_bill_list.yaml
@@ -0,0 +1,35 @@
+interactions:
+- request:
+    body: null
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Connection: [keep-alive]
+      Content-Type: [application/json]
+      User-Agent: [python-requests/2.13.0]
+    method: GET
+    uri: https://app.vindi.com.br/api/v1/bills
+  response:
+    body: {string: "{\"bills\":[{\"id\":7064381,\"code\":\"my-first-bill\",\"amount\":\"100.0\",\"installments\":1,\"status\":\"pending\",\"seen_at\":null,\"billing_at\":null,\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"url\":\"https://app.vindi.com.br/customer/bills/7064381?token=db96ea6a-561f-44ab-a040-b0909c739564\",\"created_at\":\"2017-04-21T09:18:55.000-03:00\",\"updated_at\":\"2017-04-21T09:18:56.000-03:00\",\"bill_items\":[{\"id\":8362517,\"amount\":\"100.0\",\"quantity\":null,\"pricing_range_id\":null,\"description\":null,\"pricing_schema\":null,\"product\":{\"id\":82534,\"name\":\"Product
+        1\",\"code\":\"product-1\"},\"product_item\":null,\"discount\":null}],\"charges\":[{\"id\":6803582,\"amount\":\"100.0\",\"status\":\"pending\",\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"paid_at\":null,\"installments\":1,\"attempt_count\":0,\"next_attempt\":null,\"print_url\":null,\"created_at\":\"2017-04-21T09:18:56.000-03:00\",\"updated_at\":\"2017-04-21T09:18:56.000-03:00\",\"last_transaction\":null,\"payment_method\":{\"id\":17293,\"public_name\":\"Cart\xE3o
+        de cr\xE9dito\",\"name\":\"Cart\xE3o de cr\xE9dito\",\"code\":\"credit_card\",\"type\":\"PaymentMethod::CreditCard\"}}],\"customer\":{\"id\":2481258,\"name\":\"John
+        Doe\",\"email\":\"john@doe.com\",\"code\":null},\"period\":null,\"subscription\":null,\"metadata\":{},\"payment_profile\":{\"id\":2284520,\"holder_name\":\"JOHN
+        DOE\",\"registry_code\":null,\"bank_branch\":null,\"bank_account\":null,\"card_expiration\":\"2020-12-31T23:59:59.000-02:00\",\"card_number_first_six\":\"555555\",\"card_number_last_four\":\"5557\",\"token\":\"ba3cf5f2-143f-44df-b09e-0bc69dfb7a96\",\"created_at\":\"2017-04-20T08:59:01.000-03:00\",\"payment_company\":{\"id\":1,\"name\":\"MasterCard\",\"code\":\"mastercard\"}}}]}"}
+    headers:
+      Cache-Control: ['max-age=0, private, must-revalidate']
+      Connection: [keep-alive]
+      Content-Length: ['1564']
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Fri, 21 Apr 2017 12:21:51 GMT']
+      ETag: [W/"bdd79778039b209ced3f464578a4a527"]
+      Per-Page: ['25']
+      Rate-Limit-Limit: ['120']
+      Rate-Limit-Remaining: ['119']
+      Rate-Limit-Reset: ['1492777371']
+      Server: [nginx]
+      Total: ['1']
+      Vindi-Merchant-Id: ['5963']
+      X-Request-Id: [5e28c6d7-9dd1-42ec-87e9-308a00a6ccc2]
+      X-Runtime: ['0.040105']
+    status: {code: 200, message: OK}
+version: 1
diff --git a/resources/cassettes/test_bill_retrieve.yaml b/resources/cassettes/test_bill_retrieve.yaml
new file mode 100644
index 0000000..ad81702
--- /dev/null
+++ b/resources/cassettes/test_bill_retrieve.yaml
@@ -0,0 +1,33 @@
+interactions:
+- request:
+    body: null
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Connection: [keep-alive]
+      Content-Type: [application/json]
+      User-Agent: [python-requests/2.13.0]
+    method: GET
+    uri: https://app.vindi.com.br/api/v1/bills/7064381
+  response:
+    body: {string: "{\"bill\":{\"id\":7064381,\"code\":\"my-first-bill\",\"amount\":\"100.0\",\"installments\":1,\"status\":\"pending\",\"seen_at\":null,\"billing_at\":null,\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"url\":\"https://app.vindi.com.br/customer/bills/7064381?token=db96ea6a-561f-44ab-a040-b0909c739564\",\"created_at\":\"2017-04-21T09:18:55.000-03:00\",\"updated_at\":\"2017-04-21T09:18:56.000-03:00\",\"bill_items\":[{\"id\":8362517,\"amount\":\"100.0\",\"quantity\":null,\"pricing_range_id\":null,\"description\":null,\"pricing_schema\":null,\"product\":{\"id\":82534,\"name\":\"Product
+        1\",\"code\":\"product-1\"},\"product_item\":null,\"discount\":null}],\"charges\":[{\"id\":6803582,\"amount\":\"100.0\",\"status\":\"pending\",\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"paid_at\":null,\"installments\":1,\"attempt_count\":0,\"next_attempt\":null,\"print_url\":null,\"created_at\":\"2017-04-21T09:18:56.000-03:00\",\"updated_at\":\"2017-04-21T09:18:56.000-03:00\",\"last_transaction\":null,\"payment_method\":{\"id\":17293,\"public_name\":\"Cart\xE3o
+        de cr\xE9dito\",\"name\":\"Cart\xE3o de cr\xE9dito\",\"code\":\"credit_card\",\"type\":\"PaymentMethod::CreditCard\"}}],\"customer\":{\"id\":2481258,\"name\":\"John
+        Doe\",\"email\":\"john@doe.com\",\"code\":null},\"period\":null,\"subscription\":null,\"metadata\":{},\"payment_profile\":{\"id\":2284520,\"holder_name\":\"JOHN
+        DOE\",\"registry_code\":null,\"bank_branch\":null,\"bank_account\":null,\"card_expiration\":\"2020-12-31T23:59:59.000-02:00\",\"card_number_first_six\":\"555555\",\"card_number_last_four\":\"5557\",\"token\":\"ba3cf5f2-143f-44df-b09e-0bc69dfb7a96\",\"created_at\":\"2017-04-20T08:59:01.000-03:00\",\"payment_company\":{\"id\":1,\"name\":\"MasterCard\",\"code\":\"mastercard\"}}}}"}
+    headers:
+      Cache-Control: ['max-age=0, private, must-revalidate']
+      Connection: [keep-alive]
+      Content-Length: ['1561']
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Fri, 21 Apr 2017 12:23:05 GMT']
+      ETag: [W/"4c7430bea9c7892cad07e10dbefd87cc"]
+      Rate-Limit-Limit: ['120']
+      Rate-Limit-Remaining: ['119']
+      Rate-Limit-Reset: ['1492777445']
+      Server: [nginx]
+      Vindi-Merchant-Id: ['5963']
+      X-Request-Id: [cdbd7ba3-40f3-4937-97d5-549074eac0bd]
+      X-Runtime: ['0.040206']
+    status: {code: 200, message: OK}
+version: 1
diff --git a/resources/cassettes/test_bill_update.yaml b/resources/cassettes/test_bill_update.yaml
new file mode 100644
index 0000000..6e8691a
--- /dev/null
+++ b/resources/cassettes/test_bill_update.yaml
@@ -0,0 +1,36 @@
+interactions:
+- request:
+    body: '{"code": "first-bill"}'
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Connection: [keep-alive]
+      Content-Length: ['22']
+      Content-Type: [application/json]
+      User-Agent: [python-requests/2.13.0]
+    method: PUT
+    uri: https://app.vindi.com.br/api/v1/bills/7064381
+  response:
+    body: {string: "{\"bill\":{\"id\":7064381,\"code\":\"first-bill\",\"amount\":\"100.0\",\"installments\":1,\"status\":\"paid\",\"seen_at\":\"2017-04-21T09:25:17.000-03:00\",\"billing_at\":null,\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"url\":\"https://app.vindi.com.br/customer/bills/7064381?token=db96ea6a-561f-44ab-a040-b0909c739564\",\"created_at\":\"2017-04-21T09:18:55.000-03:00\",\"updated_at\":\"2017-04-21T11:44:02.492-03:00\",\"bill_items\":[{\"id\":8362517,\"amount\":\"100.0\",\"quantity\":null,\"pricing_range_id\":null,\"description\":null,\"pricing_schema\":null,\"product\":{\"id\":82534,\"name\":\"Product
+        1\",\"code\":\"product-1\"},\"product_item\":null,\"discount\":null}],\"charges\":[{\"id\":6803582,\"amount\":\"100.0\",\"status\":\"paid\",\"due_at\":\"2017-04-24T23:59:59.000-03:00\",\"paid_at\":\"2017-04-21T10:40:52.000-03:00\",\"installments\":1,\"attempt_count\":1,\"next_attempt\":null,\"print_url\":null,\"created_at\":\"2017-04-21T09:18:56.000-03:00\",\"updated_at\":\"2017-04-21T10:40:52.000-03:00\",\"last_transaction\":{\"id\":10384095,\"transaction_type\":\"charge\",\"status\":\"success\",\"amount\":\"100.0\",\"installments\":1,\"gateway_message\":\"Transacao
+        aprovada\",\"gateway_response_code\":\"\",\"gateway_authorization\":\"2C2B04FE23B6958DF90E72AADEA3AD87\",\"gateway_transaction_id\":\"dacbe4d7-591c-4949-ae6e-5932aa2501be\",\"gateway_response_fields\":{\"test_auth\":\"cfa315f873c37a4cfca1\"},\"fraud_detector_score\":null,\"fraud_detector_status\":null,\"fraud_detector_id\":null,\"created_at\":\"2017-04-21T10:40:52.000-03:00\",\"gateway\":{\"id\":10371,\"connector\":\"test\"},\"payment_profile\":{\"id\":2284520,\"holder_name\":\"JOHN
+        DOE\",\"registry_code\":null,\"bank_branch\":null,\"bank_account\":null,\"card_expiration\":\"2020-12-31T23:59:59.000-02:00\",\"card_number_first_six\":\"555555\",\"card_number_last_four\":\"5557\",\"token\":\"ba3cf5f2-143f-44df-b09e-0bc69dfb7a96\",\"created_at\":\"2017-04-20T08:59:01.000-03:00\",\"payment_company\":{\"id\":1,\"name\":\"MasterCard\",\"code\":\"mastercard\"}}},\"payment_method\":{\"id\":17293,\"public_name\":\"Cart\xE3o
+        de cr\xE9dito\",\"name\":\"Cart\xE3o de cr\xE9dito\",\"code\":\"credit_card\",\"type\":\"PaymentMethod::CreditCard\"}}],\"customer\":{\"id\":2481258,\"name\":\"John
+        Doe\",\"email\":\"john@doe.com\",\"code\":null},\"period\":null,\"subscription\":null,\"metadata\":{},\"payment_profile\":{\"id\":2284520,\"holder_name\":\"JOHN
+        DOE\",\"registry_code\":null,\"bank_branch\":null,\"bank_account\":null,\"card_expiration\":\"2020-12-31T23:59:59.000-02:00\",\"card_number_first_six\":\"555555\",\"card_number_last_four\":\"5557\",\"token\":\"ba3cf5f2-143f-44df-b09e-0bc69dfb7a96\",\"created_at\":\"2017-04-20T08:59:01.000-03:00\",\"payment_company\":{\"id\":1,\"name\":\"MasterCard\",\"code\":\"mastercard\"}}}}"}
+    headers:
+      Cache-Control: ['max-age=0, private, must-revalidate']
+      Connection: [keep-alive]
+      Content-Length: ['2510']
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Fri, 21 Apr 2017 14:44:02 GMT']
+      ETag: [W/"6a48b84d304c981e175ebf9f46aedcc9"]
+      Rate-Limit-Limit: ['120']
+      Rate-Limit-Remaining: ['119']
+      Rate-Limit-Reset: ['1492785902']
+      Server: [nginx]
+      Vindi-Merchant-Id: ['5963']
+      X-Request-Id: [092d54bc-c315-4ee3-a0b0-7eb239f08202]
+      X-Runtime: ['0.099385']
+    status: {code: 200, message: OK}
+version: 1
diff --git a/tests/conftest.py b/tests/conftest.py
index 8be68ae..5fdd1e4 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -87,3 +87,21 @@ def payment_profile_data():
         'payment_company_code': 'mastercard',
         'customer_id': 2481258
     }
+
+
+@pytest.fixture
+def bill_data():
+    return {
+        'id': 7064381,
+        'customer_id': 2481258,
+        'code': 'my-first-bill',
+        'installments': 1,
+        'payment_method_code': 'credit_card',
+        'bill_items': [{
+            'product_code': 'product-1',
+            'amount': 100.00
+        }],
+        'payment_profile': {
+            'id': 2284520
+        }
+    }
diff --git a/tests/test_api.py b/tests/test_api.py
index 616df7a..71b0ca8 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -6,3 +6,4 @@ def test_get_api_instance():
     assert api.api_root_url == 'https://app.vindi.com.br/api/v1/'
     assert api.headers['Authorization'] == 'Basic Og=='
     assert api.headers['Content-Type'] == 'application/json'
+    assert api.json_encode_body
diff --git a/tests/test_api_resources.py b/tests/test_api_resources.py
index 5da4dde..cddeb89 100644
--- a/tests/test_api_resources.py
+++ b/tests/test_api_resources.py
@@ -141,3 +141,45 @@ def test_payment_profiles_destroy(api, payment_profile_data):
     assert response.status_code == status.HTTP_200_OK
     assert response.body['payment_profile']['id'] == payment_profile_data['id']
     assert response.body['payment_profile']['status'] == 'inactive'
+
+
+@vcr.use_cassette()
+def test_bill_create(api, bill_data):
+    body = bill_data
+    response = api.bills.create(body=body)
+    assert response.status_code == status.HTTP_201_CREATED
+    assert response.body['bill']['id'] == bill_data['id']
+
+
+@vcr.use_cassette()
+def test_bill_list(api):
+    response = api.bills.list()
+    assert response.status_code == status.HTTP_200_OK
+    assert 'bills' in response.body
+
+
+@vcr.use_cassette()
+def test_bill_retrieve(api, bill_data):
+    response = api.bills.retrieve(bill_data['id'])
+    assert response.status_code == status.HTTP_200_OK
+    assert response.body['bill']['id'] == bill_data['id']
+
+
+@vcr.use_cassette()
+def test_bill_update(api, bill_data):
+    body = {
+        'code': 'first-bill'
+    }
+    response = api.bills.update(bill_data['id'], body=body)
+    assert response.status_code == status.HTTP_200_OK
+    assert response.body['bill']['id'] == bill_data['id']
+    assert response.body['bill']['code'] == body['code']
+
+
+@vcr.use_cassette()
+def test_bill_destroy(api, bill_data):
+    id = 7071692
+    response = api.bills.destroy(id)
+    assert response.status_code == status.HTTP_200_OK
+    assert response.body['bill']['id'] == id
+    assert response.body['bill']['status'] == 'canceled'
diff --git a/vindi/api.py b/vindi/api.py
index 1d21397..ec38bdc 100644
--- a/vindi/api.py
+++ b/vindi/api.py
@@ -9,29 +9,80 @@ def get_api_instance(token='', timeout=3):
         'Authorization': basic_http_auth(token, ''),
         'Content-Type': 'application/json'
     }
+    import_batches_headers = {
+        'Authorization': basic_http_auth(token, ''),
+        'Content-Type': 'multipart/form-data'
+    }
     api_root_url = 'https://app.vindi.com.br/api/v1/'
     api = API(
         api_root_url=api_root_url, headers=headers, json_encode_body=True,
         timeout=timeout
     )
-    api.add_resource(resource_name='customers', resource_class=resource.CustomerResource)
-    api.add_resource(resource_name='plans', resource_class=resource.PlanResource)
-    api.add_resource(resource_name='products', resource_class=resource.ProductResource)
-    api.add_resource(resource_name='payment_methods', resource_class=resource.PaymentMethodResource)
-    api.add_resource(resource_name='discounts', resource_class=resource.DiscountResource)
-    api.add_resource(resource_name='subscriptions', resource_class=resource.SubscriptionResource)
-    api.add_resource(resource_name='product_items', resource_class=resource.ProductItemResource)
-    api.add_resource(resource_name='periods', resource_class=resource.PeriodResource)
-    api.add_resource(resource_name='bills', resource_class=resource.BillResource)
-    api.add_resource(resource_name='bill_items', resource_class=resource.BillItemResource)
-    api.add_resource(resource_name='charges', resource_class=resource.ChargeResource)
-    api.add_resource(resource_name='transactions', resource_class=resource.TransactionResource)
-    api.add_resource(resource_name='payment_profiles', resource_class=resource.PaymentProfileResource)
-    api.add_resource(resource_name='usages', resource_class=resource.UsageResource)
-    api.add_resource(resource_name='invoices', resource_class=resource.InvoiceResource)
-    api.add_resource(resource_name='movements', resource_class=resource.MovementResource)
-    api.add_resource(resource_name='messages', resource_class=resource.MessageResource)
-    api.add_resource(resource_name='import_batches', resource_class=resource.ImportBatchResource)
-    api.add_resource(resource_name='merchant', resource_class=resource.MerchantResource)
-    api.add_resource(resource_name='issues', resource_class=resource.IssueResource)
+    api.add_resource(
+        resource_name='customers', resource_class=resource.CustomerResource
+    )
+    api.add_resource(
+        resource_name='plans', resource_class=resource.PlanResource
+    )
+    api.add_resource(
+        resource_name='products', resource_class=resource.ProductResource
+    )
+    api.add_resource(
+        resource_name='payment_methods',
+        resource_class=resource.PaymentMethodResource
+    )
+    api.add_resource(
+        resource_name='discounts', resource_class=resource.DiscountResource
+    )
+    api.add_resource(
+        resource_name='subscriptions',
+        resource_class=resource.SubscriptionResource
+    )
+    api.add_resource(
+        resource_name='product_items',
+        resource_class=resource.ProductItemResource
+    )
+    api.add_resource(
+        resource_name='periods', resource_class=resource.PeriodResource
+    )
+    api.add_resource(
+        resource_name='bills', resource_class=resource.BillResource
+    )
+    api.add_resource(
+        resource_name='bill_items', resource_class=resource.BillItemResource
+    )
+    api.add_resource(
+        resource_name='charges', resource_class=resource.ChargeResource
+    )
+    api.add_resource(
+        resource_name='transactions',
+        resource_class=resource.TransactionResource
+    )
+    api.add_resource(
+        resource_name='payment_profiles',
+        resource_class=resource.PaymentProfileResource
+    )
+    api.add_resource(
+        resource_name='usages', resource_class=resource.UsageResource
+    )
+    api.add_resource(
+        resource_name='invoices', resource_class=resource.InvoiceResource
+    )
+    api.add_resource(
+        resource_name='movements', resource_class=resource.MovementResource
+    )
+    api.add_resource(
+        resource_name='messages', resource_class=resource.MessageResource
+    )
+    api.add_resource(
+        resource_name='import_batches',
+        resource_class=resource.ImportBatchResource,
+        json_encode_body=False, headers=import_batches_headers
+    )
+    api.add_resource(
+        resource_name='merchant', resource_class=resource.MerchantResource
+    )
+    api.add_resource(
+        resource_name='issues', resource_class=resource.IssueResource
+    )
     return api