README.md in tgbot-0.2.4 vs README.md in tgbot-0.2.7

- old
+ new

@@ -1,8 +1,8 @@
 # Tgbot
 
 [![Gem Version](https://badge.fury.io/rb/tgbot.svg)](https://badge.fury.io/rb/tgbot)
-![Bot API Version](https://img.shields.io/badge/Bot%20API-4.4-blue.svg?style=flat-square)
+![Bot API Version](https://img.shields.io/badge/Bot%20API-4.7-blue.svg?style=flat-square)
 ![](https://img.shields.io/badge/License-MIT-lightgrey.svg?style=flat-square)
 
 A tiny but easy-to-use wrapper of [Telegram Bot API](https://core.telegram.org/bots/api).
 
 ## Install