diff --git a/CHANGELOG.md b/CHANGELOG.md
index b711d0262..5ed5cf9ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 4.21.3 - 2019-07-15
+* [#810](https://github.com/stripe/stripe-ruby/pull/810) Better error message when passing non-string to custom method
+
 ## 4.21.2 - 2019-07-05
 * [#806](https://github.com/stripe/stripe-ruby/pull/806) Revert back to `initialize_from` from `Util.convert_to_stripe_object`
 
diff --git a/VERSION b/VERSION
index c93e58ee0..fedb11348 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.21.2
+4.21.3
diff --git a/lib/stripe/version.rb b/lib/stripe/version.rb
index 65bfa8625..d742b9bba 100644
--- a/lib/stripe/version.rb
+++ b/lib/stripe/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Stripe
-  VERSION = "4.21.2".freeze
+  VERSION = "4.21.3".freeze
 end