diff --git a/LICENSE b/LICENSE
index a9acc25d..749af7fb 100644
--- a/LICENSE
+++ b/LICENSE
@@ -3,7 +3,7 @@ License:
 The MIT License (MIT)
 http://opensource.org/licenses/MIT
 
-Copyright (c) 2014 - 2016 APIMATIC Limited
+Copyright (c) 2014 - 2020 APIMATIC Limited
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/bandwidth/controllers/base_controller.py b/bandwidth/controllers/base_controller.py
index 3f7583fb..35be446b 100644
--- a/bandwidth/controllers/base_controller.py
+++ b/bandwidth/controllers/base_controller.py
@@ -28,7 +28,7 @@ class BaseController(object):
 
     def global_headers(self):
         return {
-            'user-agent': 'python-sdk-refs/tags/python6.13.2'
+            'user-agent': 'python-sdk'
         }
 
     def __init__(self, config, call_back=None):
diff --git a/bandwidth/http/api_response.py b/bandwidth/http/api_response.py
index 77edf3a7..04a6c9ac 100644
--- a/bandwidth/http/api_response.py
+++ b/bandwidth/http/api_response.py
@@ -40,9 +40,15 @@ def __init__(self, http_response,
         self.errors = errors
 
     def is_success(self):
+        """ Returns true if status code is between 200-300
+
+        """
         return 200 <= self.status_code < 300
 
     def is_error(self):
+        """ Returns true if status code is between 400-600
+
+        """
         return 400 <= self.status_code < 600
 
     def __repr__(self):
diff --git a/bandwidth/messaging/controllers/api_controller.py b/bandwidth/messaging/controllers/api_controller.py
index 561002a9..764664ef 100644
--- a/bandwidth/messaging/controllers/api_controller.py
+++ b/bandwidth/messaging/controllers/api_controller.py
@@ -52,7 +52,7 @@ def list_media(self,
         # Prepare query URL
         _url_path = '/users/{userId}/media'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'userId': {'value': user_id, 'encode': True}
+            'userId': {'value': user_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.MESSAGINGDEFAULT)
         _query_builder += _url_path
@@ -115,7 +115,7 @@ def get_media(self,
         # Prepare query URL
         _url_path = '/users/{userId}/media/{mediaId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'userId': {'value': user_id, 'encode': True},
+            'userId': {'value': user_id, 'encode': False},
             'mediaId': {'value': media_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.MESSAGINGDEFAULT)
@@ -181,8 +181,8 @@ def upload_media(self,
         # Prepare query URL
         _url_path = '/users/{userId}/media/{mediaId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'userId': {'value': user_id, 'encode': True},
-            'mediaId': {'value': media_id, 'encode': True}
+            'userId': {'value': user_id, 'encode': False},
+            'mediaId': {'value': media_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.MESSAGINGDEFAULT)
         _query_builder += _url_path
@@ -251,8 +251,8 @@ def delete_media(self,
         # Prepare query URL
         _url_path = '/users/{userId}/media/{mediaId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'userId': {'value': user_id, 'encode': True},
-            'mediaId': {'value': media_id, 'encode': True}
+            'userId': {'value': user_id, 'encode': False},
+            'mediaId': {'value': media_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.MESSAGINGDEFAULT)
         _query_builder += _url_path
@@ -308,7 +308,7 @@ def create_message(self,
         # Prepare query URL
         _url_path = '/users/{userId}/messages'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'userId': {'value': user_id, 'encode': True}
+            'userId': {'value': user_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.MESSAGINGDEFAULT)
         _query_builder += _url_path
diff --git a/bandwidth/messaging/controllers/base_controller.py b/bandwidth/messaging/controllers/base_controller.py
index 3f7583fb..35be446b 100644
--- a/bandwidth/messaging/controllers/base_controller.py
+++ b/bandwidth/messaging/controllers/base_controller.py
@@ -28,7 +28,7 @@ class BaseController(object):
 
     def global_headers(self):
         return {
-            'user-agent': 'python-sdk-refs/tags/python6.13.2'
+            'user-agent': 'python-sdk'
         }
 
     def __init__(self, config, call_back=None):
diff --git a/bandwidth/twofactorauth/controllers/api_controller.py b/bandwidth/twofactorauth/controllers/api_controller.py
index 436d2458..70e1d82e 100644
--- a/bandwidth/twofactorauth/controllers/api_controller.py
+++ b/bandwidth/twofactorauth/controllers/api_controller.py
@@ -52,7 +52,7 @@ def create_voice_two_factor(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/code/voice'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.TWOFACTORAUTHDEFAULT)
         _query_builder += _url_path
@@ -106,7 +106,7 @@ def create_messaging_two_factor(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/code/messaging'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.TWOFACTORAUTHDEFAULT)
         _query_builder += _url_path
@@ -159,7 +159,7 @@ def create_verify_two_factor(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/code/verify'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.TWOFACTORAUTHDEFAULT)
         _query_builder += _url_path
diff --git a/bandwidth/twofactorauth/controllers/base_controller.py b/bandwidth/twofactorauth/controllers/base_controller.py
index 3f7583fb..35be446b 100644
--- a/bandwidth/twofactorauth/controllers/base_controller.py
+++ b/bandwidth/twofactorauth/controllers/base_controller.py
@@ -28,7 +28,7 @@ class BaseController(object):
 
     def global_headers(self):
         return {
-            'user-agent': 'python-sdk-refs/tags/python6.13.2'
+            'user-agent': 'python-sdk'
         }
 
     def __init__(self, config, call_back=None):
diff --git a/bandwidth/twofactorauth/models/two_factor_verify_request_schema.py b/bandwidth/twofactorauth/models/two_factor_verify_request_schema.py
index eb147906..6d3f9d22 100644
--- a/bandwidth/twofactorauth/models/two_factor_verify_request_schema.py
+++ b/bandwidth/twofactorauth/models/two_factor_verify_request_schema.py
@@ -15,14 +15,10 @@ class TwoFactorVerifyRequestSchema(object):
 
     Attributes:
         to (string): The phone number to send the 2fa code to.
-        mfrom (string): The application phone number, the sender of the 2fa
-            code.
         application_id (string): The application unique ID, obtained from
             Bandwidth.
         scope (string): An optional field to denote what scope or action the
             2fa code is addressing.  If not supplied, defaults to "2FA".
-        digits (float): The number of digits for your 2fa code.  The valid
-            number ranges from 2 to 8, inclusively.
         expiration_time_in_minutes (float): The time period, in minutes, to
             validate the 2fa code.  By setting this to 3 minutes, it will mean
             any code generated within the last 3 minutes are still valid.  The
@@ -35,9 +31,7 @@ class TwoFactorVerifyRequestSchema(object):
     # Create a mapping from Model property names to API property names
     _names = {
         "to": 'to',
-        "mfrom": 'from',
         "application_id": 'applicationId',
-        "digits": 'digits',
         "expiration_time_in_minutes": 'expirationTimeInMinutes',
         "code": 'code',
         "scope": 'scope'
@@ -45,9 +39,7 @@ class TwoFactorVerifyRequestSchema(object):
 
     def __init__(self,
                  to=None,
-                 mfrom=None,
                  application_id=None,
-                 digits=None,
                  expiration_time_in_minutes=None,
                  code=None,
                  scope=None):
@@ -55,10 +47,8 @@ def __init__(self,
 
         # Initialize members of the class
         self.to = to
-        self.mfrom = mfrom
         self.application_id = application_id
         self.scope = scope
-        self.digits = digits
         self.expiration_time_in_minutes = expiration_time_in_minutes
         self.code = code
 
@@ -81,18 +71,14 @@ def from_dictionary(cls,
 
         # Extract variables from the dictionary
         to = dictionary.get('to')
-        mfrom = dictionary.get('from')
         application_id = dictionary.get('applicationId')
-        digits = dictionary.get('digits')
         expiration_time_in_minutes = dictionary.get('expirationTimeInMinutes')
         code = dictionary.get('code')
         scope = dictionary.get('scope')
 
         # Return an object of this model
         return cls(to,
-                   mfrom,
                    application_id,
-                   digits,
                    expiration_time_in_minutes,
                    code,
                    scope)
diff --git a/bandwidth/voice/__init__.py b/bandwidth/voice/__init__.py
index 358ad66e..843fbc5d 100644
--- a/bandwidth/voice/__init__.py
+++ b/bandwidth/voice/__init__.py
@@ -1,7 +1,7 @@
-__all__ = [
+__all__ = [
     'bxml',
     'controllers',
     'exceptions',
     'models',
-    'voice_client',
+    'voice_client',
 ]
diff --git a/bandwidth/voice/controllers/api_controller.py b/bandwidth/voice/controllers/api_controller.py
index 472cb35f..2696af17 100644
--- a/bandwidth/voice/controllers/api_controller.py
+++ b/bandwidth/voice/controllers/api_controller.py
@@ -57,7 +57,7 @@ def create_call(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -122,8 +122,8 @@ def get_call_state(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -189,8 +189,8 @@ def modify_call(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -255,8 +255,8 @@ def modify_call_recording_state(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recording'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -320,8 +320,8 @@ def get_query_metadata_for_account_and_call(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -387,9 +387,9 @@ def get_metadata_for_recording(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -454,9 +454,9 @@ def delete_recording(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -516,9 +516,9 @@ def get_stream_recording_media(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/media'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -578,9 +578,9 @@ def delete_recording_media(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/media'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -640,9 +640,9 @@ def get_recording_transcription(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -710,9 +710,9 @@ def create_transcribe_recording(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -778,9 +778,9 @@ def delete_recording_transcription(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -847,7 +847,7 @@ def get_conferences_by_account(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -922,8 +922,8 @@ def get_conference_by_id(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -971,7 +971,7 @@ def modify_conference(self,
         Args:
             account_id (string): TODO: type description here.
             conference_id (string): TODO: type description here.
-            body (CallEngineModifyConferenceRequest, optional): TODO: type
+            body (ApiModifyConferenceRequest, optional): TODO: type
                 description here.
 
         Returns:
@@ -989,8 +989,8 @@ def modify_conference(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -1057,9 +1057,9 @@ def modify_conference_member(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}/members/{callId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True},
-            'callId': {'value': call_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False},
+            'callId': {'value': call_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -1124,9 +1124,9 @@ def get_conference_member(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}/members/{memberId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True},
-            'memberId': {'value': member_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False},
+            'memberId': {'value': member_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -1191,8 +1191,8 @@ def get_query_metadata_for_account_and_conference(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}/recordings'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -1258,9 +1258,9 @@ def get_metadata_for_conference_recording(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}/recordings/{recordingId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -1326,9 +1326,9 @@ def get_stream_conference_recording_media(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/conferences/{conferenceId}/recordings/{recordingId}/media'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'conferenceId': {'value': conference_id, 'encode': True},
-            'recordingId': {'value': recording_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'conferenceId': {'value': conference_id, 'encode': False},
+            'recordingId': {'value': recording_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
@@ -1397,7 +1397,7 @@ def get_query_metadata_for_account(self,
         # Prepare query URL
         _url_path = '/api/v2/accounts/{accountId}/recordings'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.VOICEDEFAULT)
         _query_builder += _url_path
diff --git a/bandwidth/voice/controllers/base_controller.py b/bandwidth/voice/controllers/base_controller.py
index 3f7583fb..35be446b 100644
--- a/bandwidth/voice/controllers/base_controller.py
+++ b/bandwidth/voice/controllers/base_controller.py
@@ -28,7 +28,7 @@ class BaseController(object):
 
     def global_headers(self):
         return {
-            'user-agent': 'python-sdk-refs/tags/python6.13.2'
+            'user-agent': 'python-sdk'
         }
 
     def __init__(self, config, call_back=None):
diff --git a/bandwidth/voice/models/__init__.py b/bandwidth/voice/models/__init__.py
index 1b9d7f05..7274beaa 100644
--- a/bandwidth/voice/models/__init__.py
+++ b/bandwidth/voice/models/__init__.py
@@ -3,7 +3,7 @@
     'api_call_state_response',
     'api_create_call_request',
     'api_modify_call_request',
-    'call_engine_modify_conference_request',
+    'api_modify_conference_request',
     'api_transcribe_recording_request',
     'conference_detail',
     'conference_member_detail',
diff --git a/bandwidth/voice/models/api_create_call_request.py b/bandwidth/voice/models/api_create_call_request.py
index 7351a3f8..036de8ad 100644
--- a/bandwidth/voice/models/api_create_call_request.py
+++ b/bandwidth/voice/models/api_create_call_request.py
@@ -15,7 +15,12 @@ class ApiCreateCallRequest(object):
 
     Attributes:
         mfrom (string): Format is E164
-        to (string): Format is E164
+        to (string): Format is E164 or SIP URI
+        uui (string): When calling a SIP URI, this will be sent as the
+            'User-To-User' header within the initial INVITE. An 'encoding'
+            parameter must be specified as described in
+            https://tools.ietf.org/html/rfc7433. This header cannot exceed 256
+            characters, including the encoding parameter.
         call_timeout (float): TODO: type description here.
         callback_timeout (float): TODO: type description here.
         answer_url (string): TODO: type description here.
@@ -43,6 +48,7 @@ class ApiCreateCallRequest(object):
         "to": 'to',
         "answer_url": 'answerUrl',
         "application_id": 'applicationId',
+        "uui": 'uui',
         "call_timeout": 'callTimeout',
         "callback_timeout": 'callbackTimeout',
         "answer_fallback_url": 'answerFallbackUrl',
@@ -64,6 +70,7 @@ def __init__(self,
                  to=None,
                  answer_url=None,
                  application_id=None,
+                 uui=None,
                  call_timeout=None,
                  callback_timeout=None,
                  answer_fallback_url=None,
@@ -83,6 +90,7 @@ def __init__(self,
         # Initialize members of the class
         self.mfrom = mfrom
         self.to = to
+        self.uui = uui
         self.call_timeout = call_timeout
         self.callback_timeout = callback_timeout
         self.answer_url = answer_url
@@ -122,6 +130,7 @@ def from_dictionary(cls,
         to = dictionary.get('to')
         answer_url = dictionary.get('answerUrl')
         application_id = dictionary.get('applicationId')
+        uui = dictionary.get('uui')
         call_timeout = dictionary.get('callTimeout')
         callback_timeout = dictionary.get('callbackTimeout')
         answer_fallback_url = dictionary.get('answerFallbackUrl')
@@ -142,6 +151,7 @@ def from_dictionary(cls,
                    to,
                    answer_url,
                    application_id,
+                   uui,
                    call_timeout,
                    callback_timeout,
                    answer_fallback_url,
diff --git a/bandwidth/voice/models/api_modify_conference_request.py b/bandwidth/voice/models/api_modify_conference_request.py
new file mode 100644
index 00000000..e3117c96
--- /dev/null
+++ b/bandwidth/voice/models/api_modify_conference_request.py
@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+
+"""
+bandwidth
+
+This file was automatically generated by APIMATIC v2.0 ( https://apimatic.io ).
+"""
+
+
+class ApiModifyConferenceRequest(object):
+
+    """Implementation of the 'ApiModifyConferenceRequest' model.
+
+    TODO: type model description here.
+
+    Attributes:
+        status (StatusEnum): TODO: type description here.
+        redirect_url (string): TODO: type description here.
+        redirect_fallback_url (string): TODO: type description here.
+        redirect_method (RedirectMethodEnum): TODO: type description here.
+        redirect_fallback_method (RedirectFallbackMethodEnum): TODO: type
+            description here.
+        username (string): TODO: type description here.
+        password (string): TODO: type description here.
+        fallback_username (string): TODO: type description here.
+        fallback_password (string): TODO: type description here.
+
+    """
+
+    # Create a mapping from Model property names to API property names
+    _names = {
+        "status": 'status',
+        "redirect_url": 'redirectUrl',
+        "redirect_fallback_url": 'redirectFallbackUrl',
+        "redirect_method": 'redirectMethod',
+        "redirect_fallback_method": 'redirectFallbackMethod',
+        "username": 'username',
+        "password": 'password',
+        "fallback_username": 'fallbackUsername',
+        "fallback_password": 'fallbackPassword'
+    }
+
+    def __init__(self,
+                 status=None,
+                 redirect_url=None,
+                 redirect_fallback_url=None,
+                 redirect_method=None,
+                 redirect_fallback_method=None,
+                 username=None,
+                 password=None,
+                 fallback_username=None,
+                 fallback_password=None):
+        """Constructor for the ApiModifyConferenceRequest class"""
+
+        # Initialize members of the class
+        self.status = status
+        self.redirect_url = redirect_url
+        self.redirect_fallback_url = redirect_fallback_url
+        self.redirect_method = redirect_method
+        self.redirect_fallback_method = redirect_fallback_method
+        self.username = username
+        self.password = password
+        self.fallback_username = fallback_username
+        self.fallback_password = fallback_password
+
+    @classmethod
+    def from_dictionary(cls,
+                        dictionary):
+        """Creates an instance of this model from a dictionary
+
+        Args:
+            dictionary (dictionary): A dictionary representation of the object
+            as obtained from the deserialization of the server's response. The
+            keys MUST match property names in the API description.
+
+        Returns:
+            object: An instance of this structure class.
+
+        """
+        if dictionary is None:
+            return None
+
+        # Extract variables from the dictionary
+        status = dictionary.get('status')
+        redirect_url = dictionary.get('redirectUrl')
+        redirect_fallback_url = dictionary.get('redirectFallbackUrl')
+        redirect_method = dictionary.get('redirectMethod')
+        redirect_fallback_method = dictionary.get('redirectFallbackMethod')
+        username = dictionary.get('username')
+        password = dictionary.get('password')
+        fallback_username = dictionary.get('fallbackUsername')
+        fallback_password = dictionary.get('fallbackPassword')
+
+        # Return an object of this model
+        return cls(status,
+                   redirect_url,
+                   redirect_fallback_url,
+                   redirect_method,
+                   redirect_fallback_method,
+                   username,
+                   password,
+                   fallback_username,
+                   fallback_password)
diff --git a/bandwidth/voice/models/state_enum.py b/bandwidth/voice/models/state_enum.py
index 5fb7ff43..adc39124 100644
--- a/bandwidth/voice/models/state_enum.py
+++ b/bandwidth/voice/models/state_enum.py
@@ -20,8 +20,8 @@ class StateEnum(object):
 
     """
 
-    DISCONNECTED = 'disconnected'
+    DISCONNECTED = 'DISCONNECTED'
 
-    ANSWERED = 'answered'
+    ANSWERED = 'ANSWERED'
 
-    INITIATED = 'initiated'
+    INITIATED = 'INITIATED'
diff --git a/bandwidth/webrtc/controllers/api_controller.py b/bandwidth/webrtc/controllers/api_controller.py
index cc324876..fdac0ff4 100644
--- a/bandwidth/webrtc/controllers/api_controller.py
+++ b/bandwidth/webrtc/controllers/api_controller.py
@@ -54,7 +54,7 @@ def create_participant(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/participants'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -112,8 +112,8 @@ def get_participant(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/participants/{participantId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'participantId': {'value': participant_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'participantId': {'value': participant_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -171,8 +171,8 @@ def delete_participant(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/participants/{participantId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'participantId': {'value': participant_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'participantId': {'value': participant_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -225,7 +225,7 @@ def create_session(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -283,8 +283,8 @@ def get_session(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -342,8 +342,8 @@ def delete_session(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -394,8 +394,8 @@ def list_session_participants(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}/participants'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -459,9 +459,9 @@ def add_participant_to_session(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}/participants/{participantId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True},
-            'participantId': {'value': participant_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False},
+            'participantId': {'value': participant_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -522,9 +522,9 @@ def remove_participant_from_session(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}/participants/{participantId}'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'participantId': {'value': participant_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'participantId': {'value': participant_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -577,9 +577,9 @@ def get_participant_subscriptions(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}/participants/{participantId}/subscriptions'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'participantId': {'value': participant_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'participantId': {'value': participant_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
@@ -645,9 +645,9 @@ def update_participant_subscriptions(self,
         # Prepare query URL
         _url_path = '/accounts/{accountId}/sessions/{sessionId}/participants/{participantId}/subscriptions'
         _url_path = APIHelper.append_url_with_template_parameters(_url_path, {
-            'accountId': {'value': account_id, 'encode': True},
-            'participantId': {'value': participant_id, 'encode': True},
-            'sessionId': {'value': session_id, 'encode': True}
+            'accountId': {'value': account_id, 'encode': False},
+            'participantId': {'value': participant_id, 'encode': False},
+            'sessionId': {'value': session_id, 'encode': False}
         })
         _query_builder = self.config.get_base_uri(Server.WEBRTCDEFAULT)
         _query_builder += _url_path
diff --git a/bandwidth/webrtc/controllers/base_controller.py b/bandwidth/webrtc/controllers/base_controller.py
index 3f7583fb..35be446b 100644
--- a/bandwidth/webrtc/controllers/base_controller.py
+++ b/bandwidth/webrtc/controllers/base_controller.py
@@ -28,7 +28,7 @@ class BaseController(object):
 
     def global_headers(self):
         return {
-            'user-agent': 'python-sdk-refs/tags/python6.13.2'
+            'user-agent': 'python-sdk'
         }
 
     def __init__(self, config, call_back=None):
diff --git a/setup.py b/setup.py
index e505858f..ae12a352 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 
 setup(
     name='bandwidth-sdk',
-    version='6.14.2',
+    version='7.0.0',
     description='Bandwidth\'s set of APIs',
     long_description=long_description,
     long_description_content_type="text/markdown",
@@ -24,7 +24,7 @@
         'requests>=2.9.1, <3.0',
         'jsonpickle>=0.7.1, <1.0',
         'cachecontrol>=0.11.7, <1.0',
-        'python-dateutil>=2.5.1, <3.0',
+        'python-dateutil>=2.5.3, <3.0',
         'enum34>=1.1.6',
         'lxml>=4.3.4'
     ]