README.md in interfacez-1.0.2 vs README.md in interfacez-1.0.3

@@ -9,18 +9,21 @@
 
 ```ruby
 require 'interfacez'
 
 Interfacez.default
-# => en0
+# => "en0"
 
 Interfacez.loopback
-# => lo0
+# => "lo0"
 
 Interfacez.all do |interface|
   # do something with interface name
   puts interface
 end
+
+Interfacez.ipv4_address_of("en0")
+# => "192.168.1.2"
 ```
 
 ## License
 
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).