diff --git a/OPENAPI_VERSION b/OPENAPI_VERSION
index de4ec3f3b..a75e729f5 100644
--- a/OPENAPI_VERSION
+++ b/OPENAPI_VERSION
@@ -1 +1 @@
-v214
\ No newline at end of file
+v216
\ No newline at end of file
diff --git a/lib/Checkout/Session.php b/lib/Checkout/Session.php
index 75382129c..f2efa5983 100644
--- a/lib/Checkout/Session.php
+++ b/lib/Checkout/Session.php
@@ -31,7 +31,7 @@
  * @property null|int $amount_total Total of all items after discounts and taxes are applied.
  * @property \Stripe\StripeObject $automatic_tax
  * @property null|string $billing_address_collection Describes whether Checkout should collect the customer's billing address.
- * @property string $cancel_url The URL the customer will be directed to if they decide to cancel payment and return to your website.
+ * @property null|string $cancel_url If set, Checkout displays a back button and customers will be directed to this URL if they decide to cancel payment and return to your website.
  * @property null|string $client_reference_id A unique string to reference the Checkout Session. This can be a customer ID, a cart ID, or similar, and can be used to reconcile the Session with your internal systems.
  * @property null|\Stripe\StripeObject $consent Results of <code>consent_collection</code> for this session.
  * @property null|\Stripe\StripeObject $consent_collection When set, provides configuration for the Checkout Session to gather active consent from customers.
diff --git a/lib/SubscriptionSchedule.php b/lib/SubscriptionSchedule.php
index c1d4ce02f..cc0011703 100644
--- a/lib/SubscriptionSchedule.php
+++ b/lib/SubscriptionSchedule.php
@@ -21,7 +21,7 @@
  * @property null|\Stripe\StripeObject $current_phase Object representing the start and end dates for the current phase of the subscription schedule, if it is <code>active</code>.
  * @property string|\Stripe\Customer $customer ID of the customer who owns the subscription schedule.
  * @property \Stripe\StripeObject $default_settings
- * @property string $end_behavior Behavior of the subscription schedule and underlying subscription when it ends. Possible values are <code>release</code> and <code>cancel</code>.
+ * @property string $end_behavior Behavior of the subscription schedule and underlying subscription when it ends. Possible values are <code>release</code> or <code>cancel</code> with the default being <code>release</code>. <code>release</code> will end the subscription schedule and keep the underlying subscription running.<code>cancel</code> will end the subscription schedule and cancel the underlying subscription.
  * @property bool $livemode Has the value <code>true</code> if the object exists in live mode or the value <code>false</code> if the object exists in test mode.
  * @property null|\Stripe\StripeObject $metadata Set of <a href="https://stripe.com/docs/api/metadata">key-value pairs</a> that you can attach to an object. This can be useful for storing additional information about the object in a structured format.
  * @property \Stripe\StripeObject[] $phases Configuration for the subscription schedule's phases.