diff --git a/stytch/b2b/models/sessions.py b/stytch/b2b/models/sessions.py
index 849ced2a..f402c57f 100644
--- a/stytch/b2b/models/sessions.py
+++ b/stytch/b2b/models/sessions.py
@@ -7,7 +7,7 @@
 from __future__ import annotations
 
 import datetime
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional
 
 import pydantic
 
@@ -25,8 +25,8 @@ class MemberSession(pydantic.BaseModel):
       - last_accessed_at: The timestamp when the Session was last accessed. Values conform to the RFC 3339 standard and are expressed in UTC, e.g. `2021-12-29T12:33:09Z`.
       - expires_at: The timestamp when the Session expires. Values conform to the RFC 3339 standard and are expressed in UTC, e.g. `2021-12-29T12:33:09Z`.
       - authentication_factors: An array of different authentication factors that have initiated a Session.
-      - custom_claims: The custom claims map for a Session. Claims can be added to a session during a Sessions authenticate call.
       - organization_id: Globally unique UUID that identifies a specific Organization. The `organization_id` is critical to perform operations on an Organization, so be sure to preserve this value.
+      - custom_claims: The custom claims map for a Session. Claims can be added to a session during a Sessions authenticate call.
     """  # noqa
 
     member_session_id: str
@@ -35,8 +35,8 @@ class MemberSession(pydantic.BaseModel):
     last_accessed_at: datetime.datetime
     expires_at: datetime.datetime
     authentication_factors: List[AuthenticationFactor]
-    custom_claims: Dict[str, Any]
     organization_id: str
+    custom_claims: Optional[Dict[str, Any]] = None
 
 
 class AuthenticateResponse(ResponseBase):
diff --git a/stytch/version.py b/stytch/version.py
index fb16410a..b2ea6c25 100644
--- a/stytch/version.py
+++ b/stytch/version.py
@@ -1 +1 @@
-__version__ = "7.0.1"
+__version__ = "7.0.2"