diff --git a/CHANGELOG.md b/CHANGELOG.md
index b89b418d3..f591acea5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 6.21.0 - 2018-11-08
+* [#537](https://github.com/stripe/stripe-php/pull/537) Add new API endpoints for the `Invoice` resource.
+
 ## 6.20.1 - 2018-11-07
 * [#546](https://github.com/stripe/stripe-php/pull/546) Drop files from the Composer package that aren't needed in the release
 
diff --git a/VERSION b/VERSION
index 00825aa90..7ecad1405 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.20.1
+6.21.0
diff --git a/lib/Stripe.php b/lib/Stripe.php
index 363572a7d..2c2c38246 100644
--- a/lib/Stripe.php
+++ b/lib/Stripe.php
@@ -52,7 +52,7 @@ class Stripe
     // @var float Initial delay between retries, in seconds
     private static $initialNetworkRetryDelay = 0.5;
 
-    const VERSION = '6.20.1';
+    const VERSION = '6.21.0';
 
     /**
      * @return string The API key used for requests.