diff --git a/docs/source/sos_access_protocol.rst b/docs/source/sos_access_protocol.rst
index 28c312b..2aee172 100644
--- a/docs/source/sos_access_protocol.rst
+++ b/docs/source/sos_access_protocol.rst
@@ -398,7 +398,7 @@ XML Examples <requestnewauthenticationresponse>
         <reference>46</reference>
         <status>0</status>
         <info>OK</info>
-        <authentication>8usedlb54a234md</authentication>
+        <newauthentication>8usedlb54a234md</newauthentication>
         <arrivaltime>2006-12-24 15:00:00</arrivaltime>
     </requestnewauthenticationresponse>
 
diff --git a/sos_access/schemas.py b/sos_access/schemas.py
index 2aa6bd0..3433fbf 100644
--- a/sos_access/schemas.py
+++ b/sos_access/schemas.py
@@ -160,7 +160,7 @@ class NewAuthResponse(SOSAccessRequest):
     """
 
     def __init__(
-        self, status, info, new_authentication, arrival_time=None, reference=None
+        self, status, info, new_authentication=None, arrival_time=None, reference=None
     ):
         self.reference = reference
         self.status = status
@@ -438,7 +438,7 @@ class NewAuthResponseSchema(SOSAccessSchema):
     )
     info = marshmallow.fields.String(required=True, validate=[Length(min=1, max=255)])
     new_authentication = marshmallow.fields.String(
-        required=True, validate=[Length(equal=15)], data_key="newauthentication"
+        required=False, validate=[Length(equal=15)], data_key="newauthentication"
     )
     arrival_time = marshmallow.fields.DateTime(
         allow_none=True, data_key="arrivaltime", datetimeformat="rfc"