diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4dff4b9..1ab9ee6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,13 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/) and [Keep a CHANGELOG](http://keepachangelog.com).
 
+## [1.4.0] - 2017-09-28
+
+### Added
+
+* Ability to add pass through callbacks in order to access output buffer from a long running callee - [#11]  
+  See an [example in the documentation](./README.md#reading-output-buffer-from-worker-script-using-pass-through-callbacks) for further informaiton.
+
 ## [1.3.0] - 2017-06-15
 
 ### Changed
@@ -97,6 +104,7 @@ Based on [Pierrick Charron](https://github.com/adoy)'s [PHP-FastCGI-Client](http
  * Getters/Setters for connect timeout, read/write timeout, keep alive, socket persistence from `Client` (now part of the socket connection)
  * Method `Client->getValues()`
 
+[1.4.0]: https://github.com/hollodotme/fast-cgi-client/compare/v1.3.0...v1.4.0
 [1.3.0]: https://github.com/hollodotme/fast-cgi-client/compare/v1.2.0...v1.3.0
 [1.2.0]: https://github.com/hollodotme/fast-cgi-client/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/hollodotme/fast-cgi-client/compare/v1.0.1...v1.1.0
@@ -108,3 +116,4 @@ Based on [Pierrick Charron](https://github.com/adoy)'s [PHP-FastCGI-Client](http
 [#5]: https://github.com/hollodotme/fast-cgi-client/issues/5
 [#6]: https://github.com/hollodotme/fast-cgi-client/issues/6
 [#9]: https://github.com/hollodotme/fast-cgi-client/issues/9
+[#11]: https://github.com/hollodotme/fast-cgi-client/issues/11