diff --git a/OPENAPI_VERSION b/OPENAPI_VERSION
index d9f3b7218..c13f8f959 100644
--- a/OPENAPI_VERSION
+++ b/OPENAPI_VERSION
@@ -1 +1 @@
-v183
\ No newline at end of file
+v184
\ No newline at end of file
diff --git a/lib/Treasury/OutboundTransfer.php b/lib/Treasury/OutboundTransfer.php
index 9630ca41f..a21680bee 100644
--- a/lib/Treasury/OutboundTransfer.php
+++ b/lib/Treasury/OutboundTransfer.php
@@ -23,7 +23,7 @@
  * @property int $created Time at which the object was created. Measured in seconds since the Unix epoch.
  * @property string $currency Three-letter <a href="https://www.iso.org/iso-4217-currency-codes.html">ISO currency code</a>, in lowercase. Must be a <a href="https://stripe.com/docs/currencies">supported currency</a>.
  * @property null|string $description An arbitrary string attached to the object. Often useful for displaying to users.
- * @property string $destination_payment_method The PaymentMethod used as the payment instrument for an OutboundTransfer.
+ * @property null|string $destination_payment_method The PaymentMethod used as the payment instrument for an OutboundTransfer.
  * @property \Stripe\StripeObject $destination_payment_method_details
  * @property int $expected_arrival_date The date when funds are expected to arrive in the destination account.
  * @property string $financial_account The FinancialAccount that funds were pulled from.
diff --git a/tests/Stripe/GeneratedExamplesTest.php b/tests/Stripe/GeneratedExamplesTest.php
index 206a87c18..066a0d33f 100644
--- a/tests/Stripe/GeneratedExamplesTest.php
+++ b/tests/Stripe/GeneratedExamplesTest.php
@@ -382,7 +382,7 @@ public function testFundCashBalanceCustomer()
             'cus_123',
             ['amount' => 30, 'currency' => 'eur']
         );
-        static::assertInstanceOf(\Stripe\CustomerBalanceTransaction::class, $result);
+        static::assertInstanceOf(\Stripe\CustomerCashBalanceTransaction::class, $result);
     }
 
     public function testDeliverCardCard()