Update README.md

README.md

@@ -5,7 +5,7 @@
 [![Version](https://img.shields.io/cocoapods/v/KeychainAccess.svg?style=flat)](http://cocoadocs.org/docsets/KeychainAccess)
 [![Platform](https://img.shields.io/cocoapods/p/KeychainAccess.svg?style=flat)](http://cocoadocs.org/docsets/KeychainAccess)
 
-KeychainAccess is a simple Swift wrapper for Keychain that works on iOS and OS X. Makes using Keychain APIs exremely easy and much more palatable to use in Swift.
+KeychainAccess is a simple Swift wrapper for Keychain that works on iOS and OS X. Makes using Keychain APIs extremely easy and much more palatable to use in Swift.
 
 <img src="https://raw.githubusercontent.com/kishikawakatsumi/KeychainAccess/master/Screenshots/01.png" width="320px" />
 <img src="https://raw.githubusercontent.com/kishikawakatsumi/KeychainAccess/master/Screenshots/02.png" width="320px" />