diff --git a/openpaygo/metrics_request.py b/openpaygo/metrics_request.py
index 72a05b8..9672b58 100644
--- a/openpaygo/metrics_request.py
+++ b/openpaygo/metrics_request.py
@@ -50,10 +50,10 @@ def get_simple_request_dict(self):
         simple_request["historical_data"] = self.historical_data
         # We prepare the auth
         if self.auth_method:
-            simple_request[
-                "auth"
-            ] = OpenPAYGOMetricsShared.generate_request_signature_from_data(
-                simple_request, self.auth_method, self.secret_key
+            simple_request["auth"] = (
+                OpenPAYGOMetricsShared.generate_request_signature_from_data(
+                    simple_request, self.auth_method, self.secret_key
+                )
             )
         return simple_request
 
@@ -83,10 +83,10 @@ def get_condensed_request_dict(self):
             raise ValueError(
                 "Additional variables not present in the data format: " + str(data_copy)
             )
-        condensed_request[
-            "data"
-        ] = OpenPAYGOMetricsShared.remove_trailing_empty_elements(
-            condensed_request["data"]
+        condensed_request["data"] = (
+            OpenPAYGOMetricsShared.remove_trailing_empty_elements(
+                condensed_request["data"]
+            )
         )
         # We add the historical data
         historical_data_copy = copy.deepcopy(self.historical_data)
@@ -105,10 +105,10 @@ def get_condensed_request_dict(self):
             condensed_request["historical_data"].append(time_step_data)
         # We prepare the auth
         if self.auth_method:
-            condensed_request[
-                "auth"
-            ] = OpenPAYGOMetricsShared.generate_request_signature_from_data(
-                condensed_request, self.auth_method, self.secret_key
+            condensed_request["auth"] = (
+                OpenPAYGOMetricsShared.generate_request_signature_from_data(
+                    condensed_request, self.auth_method, self.secret_key
+                )
             )
         # We replace the key names by the condensed ones
         condensed_request = OpenPAYGOMetricsShared.convert_dict_keys_to_condensed(
diff --git a/openpaygo/metrics_response.py b/openpaygo/metrics_response.py
index 2568d61..9ad4951 100644
--- a/openpaygo/metrics_response.py
+++ b/openpaygo/metrics_response.py
@@ -171,14 +171,14 @@ def get_answer_dict(self):
         # If there is not data format, we just return the full response
         condensed_answer = copy.deepcopy(self.response_dict)
         if self.secret_key:
-            condensed_answer[
-                "auth"
-            ] = OpenPAYGOMetricsShared.generate_response_signature_from_data(
-                serial_number=self.request_dict.get("serial_number"),
-                request_count=self.request_dict.get("request_count"),
-                data=condensed_answer,
-                timestamp=self.request_dict.get("timestamp"),
-                secret_key=self.secret_key,
+            condensed_answer["auth"] = (
+                OpenPAYGOMetricsShared.generate_response_signature_from_data(
+                    serial_number=self.request_dict.get("serial_number"),
+                    request_count=self.request_dict.get("request_count"),
+                    data=condensed_answer,
+                    timestamp=self.request_dict.get("timestamp"),
+                    secret_key=self.secret_key,
+                )
             )
         return OpenPAYGOMetricsShared.convert_dict_keys_to_condensed(condensed_answer)