diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b3f5aa..7b5df7b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [0.4.0](https://github.com/keithito/SimpleAnimation/releases/tag/0.4.0)
+*2017-12-21*
+
+- Migrate project to Swift 4 - [#16](https://github.com/keithito/SimpleAnimation/pull/16)
+  If using Xcode 8, please use the 0.3.2 release.
+
+
 ## [0.3.2](https://github.com/keithito/SimpleAnimation/releases/tag/0.3.2)
 *2017-08-21*
 
diff --git a/README.md b/README.md
index ae23dc9..7632306 100644
--- a/README.md
+++ b/README.md
@@ -35,8 +35,7 @@ view.shake(toward: .top, amount: 0.5, duration: 2, delay: 0.5)
 
 ### CocoaPods
 
-SimpleAnimation is available through [CocoaPods](http://cocoapods.org). To install
-it, add the following to your `Podfile`:
+To integrate SimpleAnimation into a project using [CocoaPods](http://cocoapods.org), add the following to your `Podfile`:
 
 ```ruby
 pod "SimpleAnimation"
@@ -46,14 +45,20 @@ pod "SimpleAnimation"
 
 ### Carthage
 
-SimpleAnimation is available through [Carthage](https://github.com/Carthage/Carthage). To install
-it, add the following to your `Cartfile`:
+To integrate SimpleAnimation into a project using [Carthage](https://github.com/Carthage/Carthage), add the following to your `Cartfile`:
 
 ```
 github "keithito/SimpleAnimation"
 ```
 
 
+### Older Xcode Versions
+
+If you are using Xcode 8 to build your project, you need to use version **0.3.2** of SimpleAnimation.
+You can do so by specifying the version number in your Podfile or Cartfile.
+
+
+
 ## Supported Animations
 
 The following animations are supported so far:
diff --git a/SimpleAnimation.podspec b/SimpleAnimation.podspec
index c9c46e5..acdc1f1 100644
--- a/SimpleAnimation.podspec
+++ b/SimpleAnimation.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "SimpleAnimation"
-  s.version          = "0.3.2"
+  s.version          = "0.4.0"
   s.summary          = "A UIView extension to make basic animations, like fades and bounces, simple."
   s.homepage         = "https://github.com/keithito/SimpleAnimation"
   s.license          = 'MIT'