diff --git a/CHANGELOG.md b/CHANGELOG.md
index f98ea57b..1ec5a2f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,17 @@
 # Recurly PHP Client Library CHANGELOG
 
-## Unreleased
+## Version 2.3.1 (Sept 26th, 2014)
 
 * Added remaining billing cycles to subscriptions: `subscription->remaining_billing_cycles` [91](https://github.com/recurly/recurly-client-php/pull/91)
 * Added subscription change preview for existing subscriptions: `subscription->preview()` [94](https://github.com/recurly/recurly-client-php/pull/94)
+* Remove readme reference to recurlyjs v2 private key [97](https://github.com/recurly/recurly-client-php/pull/97)
+* Addding bulk parameter to subscription creation [98](https://github.com/recurly/recurly-client-php/pull/98)
 * Added account entity use code: `account->entity_use_code` [100](https://github.com/recurly/recurly-client-php/pull/100)
+* Added PHP 5.6 and HHVM to travis.yml (thanks to [Nyholm](https://github.com/Nyholm)) [101](https://github.com/recurly/recurly-client-php/pull/101)
+* Update branch alias to 2.3.x-dev (thanks to [bangpound](https://github.com/bangpound)) [102](https://github.com/recurly/recurly-client-php/pull/102)
+* Bump phpunit to 4.2 [103](https://github.com/recurly/recurly-client-php/pull/103)
+* Adds PayPal and Amazon support to Recurly_BillingInfo [104](https://github.com/recurly/recurly-client-php/pull/104)
+* Adding bulk parameter to `$subscription->postpone()` [105](https://github.com/recurly/recurly-client-php/pull/105)
 
 ## Version 2.3.0 (May 19th, 2014)
 
diff --git a/README.md b/README.md
index abb40966..5a86dadf 100644
--- a/README.md
+++ b/README.md
@@ -75,3 +75,7 @@ Please see the [Recurly API](http://docs.recurly.com/api) for more information.
 
 - [@recurly](https://twitter.com/recurly)
 - [Google Group Announcements](https://groups.google.com/group/recurly-api)
+
+## Contributing Guidelines
+
+Please refer to [CONTRIBUTING.md](CONTRIBUTING.md)
diff --git a/lib/recurly/client.php b/lib/recurly/client.php
index 215bfa32..a6c3df5b 100644
--- a/lib/recurly/client.php
+++ b/lib/recurly/client.php
@@ -34,7 +34,7 @@ class Recurly_Client
    */
   private $_acceptLanguage = 'en-US';
 
-  const API_CLIENT_VERSION = '2.3.0';
+  const API_CLIENT_VERSION = '2.3.1';
   const DEFAULT_ENCODING = 'UTF-8';
 
   const GET = 'GET';