diff --git a/OPENAPI_VERSION b/OPENAPI_VERSION
index dae9a81fb..b46614ccd 100644
--- a/OPENAPI_VERSION
+++ b/OPENAPI_VERSION
@@ -1 +1 @@
-v446
\ No newline at end of file
+v450
\ No newline at end of file
diff --git a/lib/TaxRate.php b/lib/TaxRate.php
index c0bc90262..b210270de 100644
--- a/lib/TaxRate.php
+++ b/lib/TaxRate.php
@@ -16,7 +16,7 @@
  * @property int $created Time at which the object was created. Measured in seconds since the Unix epoch.
  * @property null|string $description An arbitrary string attached to the tax rate for your internal use only. It will not be visible to your customers.
  * @property string $display_name The display name of the tax rates as it will appear to your customer on their receipt email, PDF, and the hosted invoice page.
- * @property null|float $effective_percentage Actual/effective tax rate percentage out of 100. For tax calculations with automatic_tax[enabled]=true, this percentage does not include the statutory tax rate of non-taxable jurisdictions.
+ * @property null|float $effective_percentage Actual/effective tax rate percentage out of 100. For tax calculations with automatic_tax[enabled]=true, this percentage reflects the rate actually used to calculate tax based on the product's taxability and whether the user is registered to collect taxes in the corresponding jurisdiction.
  * @property bool $inclusive This specifies if the tax rate is inclusive or exclusive.
  * @property null|string $jurisdiction The jurisdiction for the tax rate. You can use this label field for tax reporting purposes. It also appears on your customer’s invoice.
  * @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.