diff --git a/.stats.yml b/.stats.yml
index 9a2cf9d..be07776 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 18
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fbrowserbase-6a5cbe2f816042d594335d77f9600cd47cdb9c21d9d60971a2eca87983061c72.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fbrowserbase-396a2b9092f645c5a9e46a1f3be8c2e45ca9ae079e1d39761eb0a73f56e24b15.yml
diff --git a/src/browserbase/types/sessions/session_log.py b/src/browserbase/types/sessions/session_log.py
index af58030..428f518 100644
--- a/src/browserbase/types/sessions/session_log.py
+++ b/src/browserbase/types/sessions/session_log.py
@@ -14,7 +14,7 @@ class Request(BaseModel):
 
     raw_body: str = FieldInfo(alias="rawBody")
 
-    timestamp: int
+    timestamp: Optional[int] = None
     """milliseconds that have elapsed since the UNIX epoch"""
 
 
@@ -23,7 +23,7 @@ class Response(BaseModel):
 
     result: Dict[str, object]
 
-    timestamp: int
+    timestamp: Optional[int] = None
     """milliseconds that have elapsed since the UNIX epoch"""
 
 
@@ -34,9 +34,6 @@ class SessionLog(BaseModel):
 
     session_id: str = FieldInfo(alias="sessionId")
 
-    timestamp: int
-    """milliseconds that have elapsed since the UNIX epoch"""
-
     frame_id: Optional[str] = FieldInfo(alias="frameId", default=None)
 
     loader_id: Optional[str] = FieldInfo(alias="loaderId", default=None)
@@ -44,3 +41,6 @@ class SessionLog(BaseModel):
     request: Optional[Request] = None
 
     response: Optional[Response] = None
+
+    timestamp: Optional[int] = None
+    """milliseconds that have elapsed since the UNIX epoch"""