README.md in tanita-api-client-0.2.2 vs README.md in tanita-api-client-0.2.3

@@ -1,6 +1,7 @@
 # Tanita::Api::Client
 
+[![Gem Version](https://badge.fury.io/rb/tanita-api-client.svg)](http://badge.fury.io/rb/tanita-api-client)
 
 ## About
 
 These client libraries are created for [Tanita Health Planet](https://www.healthplanet.jp/) APIs.