diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea381bf7..db914eab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,36 @@
 CHANGELOG
 =========
 
+4.0.0.rc-2 (2014-03-25)
+-----------------------
+
+* Removed `getConfig()` and `setConfig()` from clients to avoid confusion
+  around whether things like base_url, message_factory, etc should be able to
+  be retrieved or modified.
+* Added `getDefaultOption()` and `setDefaultOption()` to ClientInterface
+* functions.php functions were renamed using snake_case to match PHP idioms
+* Added support for `HTTP_PROXY`, `HTTPS_PROXY`, and
+  `GUZZLE_CURL_SELECT_TIMEOUT` environment variables
+* Added the ability to specify custom `sendAll()` event priorities
+* Added the ability to specify custom stream context options to the stream
+  adapter.
+* Added a functions.php function for `get_path()` and `set_path()`
+* CurlAdapter and MultiAdapter now use a callable to generate curl resources
+* MockAdapter now properly reads a body and emits a `headers` event
+* Updated Url class to check if a scheme and host are set before adding ":"
+  and "//". This allows empty Url (e.g., "") to be serialized as "".
+* Parsing invalid XML no longer emits warnings
+* Curl classes now properly throw AdapterExceptions
+* Various performance optimizations
+* Streams are created with the faster `Stream\create()` function
+* Marked deprecation_proxy() as internal
+* Test server is now a collection of static methods on a class
+
+4.0.0-rc.1 (2014-03-15)
+-----------------------
+
+* See https://github.com/guzzle/guzzle/blob/master/UPGRADING.md#3x-to-40
+
 3.8.1 (2014-01-28)
 ------------------
 
diff --git a/src/ClientInterface.php b/src/ClientInterface.php
index b3be8a48..cef08bdf 100644
--- a/src/ClientInterface.php
+++ b/src/ClientInterface.php
@@ -13,7 +13,7 @@ use GuzzleHttp\Exception\AdapterException;
  */
 interface ClientInterface extends HasEmitterInterface
 {
-    const VERSION = '4.0-dev';
+    const VERSION = '4.0.0.rc-2';
 
     /**
      * Create and return a new {@see RequestInterface} object.