diff --git a/felt/core/s3_upload_parameters.py b/felt/core/s3_upload_parameters.py
index 15ef7c9..62c574f 100644
--- a/felt/core/s3_upload_parameters.py
+++ b/felt/core/s3_upload_parameters.py
@@ -50,15 +50,20 @@ def from_json(res: str) -> 'S3UploadParameters':
         """
         return S3UploadParameters(
             type=res.get('data', {}).get('type'),
-            aws_access_key_id=res.get('presigned_attributes', {}).get('AWSAccessKeyId'),
+            aws_access_key_id=res.get('presigned_attributes', {})
+                .get('AWSAccessKeyId'),
             acl=res.get('presigned_attributes', {}).get('acl'),
             key=res.get('presigned_attributes', {}).get('key'),
             policy=res.get('presigned_attributes', {}).get('policy'),
             signature=res.get('presigned_attributes', {}).get('signature'),
-            success_action_status=res.get('presigned_attributes', {}).get('success_action_status'),
-            x_amz_meta_features_flags=res.get('presigned_attributes', {}).get('x-amz-meta-feature-flags'),
-            x_amz_meta_file_count=res.get('presigned_attributes', {}).get('x-amz-meta-file-count'),
-            x_amz_security_token=res.get('presigned_attributes', {}).get('x-amz-security-token'),
+            success_action_status=res.get('presigned_attributes', {})
+                .get('success_action_status'),
+            x_amz_meta_features_flags=res.get('presigned_attributes', {})
+                .get('x-amz-meta-feature-flags'),
+            x_amz_meta_file_count=res.get('presigned_attributes', {})
+                .get('x-amz-meta-file-count'),
+            x_amz_security_token=res.get('presigned_attributes', {})
+                .get('x-amz-security-token'),
             url=res.get('url'),
             layer_id=res.get('layer_id'),
         )