diff --git a/OPENAPI_VERSION b/OPENAPI_VERSION
index 0fef50283..32518f99b 100644
--- a/OPENAPI_VERSION
+++ b/OPENAPI_VERSION
@@ -1 +1 @@
-v1640
\ No newline at end of file
+v1642
\ No newline at end of file
diff --git a/stripe/_invoice.py b/stripe/_invoice.py
index 3014f7d36..2b4452640 100644
--- a/stripe/_invoice.py
+++ b/stripe/_invoice.py
@@ -4297,7 +4297,6 @@ class VoidInvoiceParams(RequestOptions):
     The status of the invoice, one of `draft`, `open`, `paid`, `uncollectible`, or `void`. [Learn more](https://stripe.com/docs/billing/invoices/workflow#workflow-overview)
     """
     status_transitions: StatusTransitions
-    subscription: Optional[ExpandableField["Subscription"]]
     subtotal: int
     """
     Total of all subscriptions, invoice items, and prorations on the invoice before any invoice level discount or exclusive tax is applied. Item discounts are already incorporated
diff --git a/stripe/_subscription.py b/stripe/_subscription.py
index 71d1b35a9..d9329cecf 100644
--- a/stripe/_subscription.py
+++ b/stripe/_subscription.py
@@ -2014,7 +2014,7 @@ class SearchParams(RequestOptions):
     """
     A date in the future at which the subscription will automatically get canceled
     """
-    cancel_at_period_end: Optional[bool]
+    cancel_at_period_end: bool
     """
     Whether this subscription will (if `status=active`) or did (if `status=canceled`) cancel at the end of the current billing period.
     """