diff --git a/lemur/plugins/lemur_aws/plugin.py b/lemur/plugins/lemur_aws/plugin.py
index 28c34acd..c9da599b 100644
--- a/lemur/plugins/lemur_aws/plugin.py
+++ b/lemur/plugins/lemur_aws/plugin.py
@@ -281,7 +281,7 @@ class S3DestinationPlugin(ExportDestinationPlugin):
             'helpMessage': 'Must be a valid S3 bucket name!',
         },
         {
-            'name': 'account_number',
+            'name': 'accountNumber',
             'type': 'str',
             'required': True,
             'validation': '/^[0-9]{12,12}$/',
@@ -319,13 +319,13 @@ class S3DestinationPlugin(ExportDestinationPlugin):
 
         for ext, passphrase, data in files:
             s3.put(
-                self.get_option('region', options),
                 self.get_option('bucket', options),
-                '{prefix}/{name}{extension}'.format(
+                self.get_option('region', options),
+                '{prefix}/{name}.{extension}'.format(
                     prefix=self.get_option('prefix', options),
                     name=name,
                     extension=ext),
-                self.get_option('encrypt', options),
                 data,
+                self.get_option('encrypt', options),
                 account_number=self.get_option('accountNumber', options)
             )
diff --git a/lemur/plugins/lemur_aws/s3.py b/lemur/plugins/lemur_aws/s3.py
index 0ba7aa4b..9e98d3c5 100644
--- a/lemur/plugins/lemur_aws/s3.py
+++ b/lemur/plugins/lemur_aws/s3.py
@@ -10,24 +10,28 @@ from flask import current_app
 from .sts import sts_client
 
 
-@sts_client('s3', 'resource')
-def put(resource, bucket_name, prefix, data, encrypt):
+@sts_client('s3', service_type='resource')
+def put(bucket_name, region, prefix, data, encrypt, **kwargs):
     """
     Use STS to write to an S3 bucket
     """
-    bucket = resource.Bucket(bucket_name)
+    bucket = kwargs['resource'].Bucket(bucket_name)
     current_app.logger.debug('Persisting data to S3. Bucket: {0} Prefix: {1}'.format(bucket_name, prefix))
 
+    # get data ready for writing
+    if isinstance(data, str):
+        data = data.encode('utf-8')
+
     if encrypt:
         bucket.put_object(
             Key=prefix,
-            Body=data.encode('utf-8'),
+            Body=data,
             ACL='bucket-owner-full-control',
             ServerSideEncryption='AES256'
         )
     else:
         bucket.put_object(
             Key=prefix,
-            Body=data.encode('utf-8'),
+            Body=data,
             ACL='bucket-owner-full-control'
         )
diff --git a/lemur/plugins/lemur_aws/sts.py b/lemur/plugins/lemur_aws/sts.py
index 0ef1c3f8..d82297e5 100644
--- a/lemur/plugins/lemur_aws/sts.py
+++ b/lemur/plugins/lemur_aws/sts.py
@@ -22,6 +22,8 @@ def sts_client(service, service_type='client'):
                 current_app.config.get('LEMUR_INSTANCE_PROFILE', 'Lemur')
             )
 
+            current_app.logger.debug('Assuming Role. Role: {0}'.format(arn))
+
             # TODO add user specific information to RoleSessionName
             role = sts.assume_role(RoleArn=arn, RoleSessionName='lemur')