diff --git a/README.md b/README.md
index 31968dd..20f83d3 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 [![Build Status](https://travis-ci.org/raphaelmor/Polyline.svg?branch=master)](https://travis-ci.org/raphaelmor/Polyline)
 [![CocoaPods](https://img.shields.io/cocoapods/v/Polyline.svg)](http://cocoadocs.org/docsets/Polyline)
-![](https://img.shields.io/badge/Swift-2.0-green.svg)
+![](https://img.shields.io/badge/Swift-3.0-green.svg)
 [![Licence](http://img.shields.io/badge/Licence-MIT-lightgrey.svg)](https://github.com/raphaelmor/Polyline/blob/master/LICENSE.txt)
 
 Polyline encoder / decoder in Swift
@@ -29,7 +29,7 @@ Polyline encoder / decoder in Swift
 - Continuous integration with [Travis CI](http://travis-ci.org)
 - CocoaPod available
 
-### Planned for future releases 
+### Planned for future releases
 
 - Convert to `MKPolyline`
 - Convert to `GMSPolyline`
@@ -37,13 +37,16 @@ Polyline encoder / decoder in Swift
 - Filter locations available at a specific level
 
 ### Planned when support is available :
-- Code Coverage with [Coveralls](https://coveralls.io)
 
+- Code Coverage with [Coveralls](https://coveralls.io)
 
 ## Requirements
 
-- Xcode 7+
+- Xcode 8+
 - iOS 8.0+ / Mac OS X 10.10+ / tvOS 9.0+ / watchOS 2.0+
+- Swift 3.0
+
+Note: The last version to support Swift 2.3 is the 3.x series. 4.0 will only support Swift 3.x.
 
 ---
 
@@ -55,14 +58,14 @@ To use this library in your project you can use CocoaPods, Carthage, and/or inte
 You can integrate Polyline in your `Podfile` like this:
 
 ```
-pod 'Polyline', '~> 3.0'
+pod 'Polyline', '~> 4.0'
 ```
 
 ### Carthage
 You can integrate Polyline in your `Cartfile` like this:
 
 ```
-github "raphaelmor/Polyline" ~> 3.0
+github "raphaelmor/Polyline" ~> 4.0
 ```
 
 ### Manual
@@ -75,6 +78,7 @@ github "raphaelmor/Polyline" ~> 3.0
 ### Polyline Encoding
 
 Using `[CLLocationCoordinate2D]` (recommended) :
+
 ```swift
 let coordinates = [CLLocationCoordinate2D(latitude: 40.2349727, longitude: -3.7707443),
 CLLocationCoordinate2D(latitude: 44.3377999, longitude: 1.2112933)]
@@ -99,7 +103,7 @@ let encodedPolyline: String = polyline.encodedPolyline
 let encodedPolyline: String = encodeLocations(locations)
 ```
 
-You can encode levels too : 
+You can encode levels too :
 
 ```swift
 let levels: [UInt32] = [0,1,2,255]
@@ -146,7 +150,7 @@ let levels: [UInt32]? = decodeLevels("BA")
 
 ### Polyline Precision
 
-Default precision is 1e5 : 0.12345 (5 digit precision used by Google), but you can specify your own precision in all API methods (and functions). 
+Default precision is 1e5 : 0.12345 (5 digit precision used by Google), but you can specify your own precision in all API methods (and functions).
 
 ```swift
 // OSRM uses a 6 digit precision
@@ -154,7 +158,7 @@ let polyline = Polyline(encodedPolyline: "ak{hRak{hR", precision: 1e6)
 ```
 
 
-        
+
 ## Notes
 This library tries to have consistent results with polylines generated by the [Google Maps iOS SDK](https://developers.google.com/maps/documentation/ios/).
 The online tool for [encoding polylines](https://developers.google.com/maps/documentation/utilities/polylineutility) has some minor inconsistencies regarding rounding (for example, 0.000015 is rounded to 0.00002 for latitudes, but 0.00001 for longitudes).
@@ -163,8 +167,8 @@ This codes tries to adhere to the [GitHub Swift Style Guide](https://github.com/
 
 ## Contributors
 
-- [Raphaël Mor](http://github.com/raphaelmor) ([@raphaelmor](https://twitter.com/raphaelmor)) : Creator
-- [Tom Taylor](https://tomtaylor.co.uk) : Maintainer
+- [Raphaël Mor](http://github.com/raphaelmor) ([@raphaelmor](https://twitter.com/raphaelmor)): Creator
+- [Tom Taylor](https://tomtaylor.co.uk): Maintainer
 
 ## License
 Polyline is released under an MIT license. See [LICENSE.txt](https://github.com/raphaelmor/Polyline/blob/master/LICENSE.txt) for more information.