diff --git a/ChangeLog.md b/ChangeLog.md
index 2d83fb9..f99fde1 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,20 @@
 # ChangeLog
 
+## 0.4.0 (07/24/2015)
+
+* Fix: Possible crash caused by missing response object (#26)
+* Fix: Anticipating rounding errors in progress checks (#16)
+* Fix: Potential crashes caused by improper resource management (#25, #19)
+* Feature: Add safe methods to perform state changes and adjustments,
+  i.e., `tryFulfil:`, `tryFail:` and `tryProgress:`.
+* Feature: Add methods `waitForResultWithin:` and `waitForErrorWithin:` to
+  simplify testing asynchronous code.
+* Feature: Add new `collect:` combinator: it collects all outcomes of the
+  supplied promises, i.e., errors and values. Thus it never fails.
+* Feature: Add new `relay:` combinator: Relays all promise events to a
+  specified deferred.
+* Feature: Add new `always:` and `always:on:` callback handlers.
+
 ## 0.3.0 (04/04/2014)
 
 * Feature: New `defaultQueue` property on `OMPromise` inheriting from a
diff --git a/OMPromises.podspec b/OMPromises.podspec
index c007ed6..473af43 100644
--- a/OMPromises.podspec
+++ b/OMPromises.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'OMPromises'
-  s.version      = '0.3.0'
+  s.version      = '0.4.0'
   s.summary      = 'Promises for iOS & Mac OS X'
   s.homepage     = 'http://github.com/b52/OMPromises'
   s.license      = { :type => 'MIT', :file => 'LICENSE' }
diff --git a/README.md b/README.md
index 13d15b7..c9692f4 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ The recommended approach for installing OMPromises is to use [CocoaPods] package
 manager.
 
 ```bash
-pod 'OMPromises', '~> 0.3.0'
+pod 'OMPromises', '~> 0.4.0'
 ```
 
 If you want to make use of the new HTTP request API you also have to include
@@ -36,7 +36,7 @@ the new subspec. Have a look at the corresponding [header](Classes/HTTP)
 files for more information.
 
 ```bash
-pod 'OMPromises/HTTP', '~> 0.3.0'
+pod 'OMPromises/HTTP', '~> 0.4.0'
 ```
 
 ## Documentation