README.md in truemail-1.9.0 vs README.md in truemail-1.9.1

@@ -2,10 +2,12 @@
 
 [![Maintainability](https://api.codeclimate.com/v1/badges/657aa241399927dcd2e2/maintainability)](https://codeclimate.com/github/rubygarage/truemail/maintainability) [![Test Coverage](https://api.codeclimate.com/v1/badges/657aa241399927dcd2e2/test_coverage)](https://codeclimate.com/github/rubygarage/truemail/test_coverage) [![CircleCI](https://circleci.com/gh/rubygarage/truemail/tree/master.svg?style=svg)](https://circleci.com/gh/rubygarage/truemail/tree/master) [![Gem Version](https://badge.fury.io/rb/truemail.svg)](https://badge.fury.io/rb/truemail) [![Downloads](https://img.shields.io/gem/dt/truemail.svg?colorA=004d99&colorB=0073e6)](https://rubygems.org/gems/truemail) [![Gitter](https://badges.gitter.im/truemail-rb/community.svg)](https://gitter.im/truemail-rb/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
 
 Configurable framework agnostic plain Ruby email validator. Verify email via Regex, DNS and SMTP. Be sure that email address valid and exists.
 
+> Actual and maintainable documentation :books: for developers is living [here](https://truemail-rb.org/truemail-gem).
+
 ## Table of Contents
 
 - [Synopsis](#synopsis)
 - [Features](#features)
 - [Requirements](#requirements)
@@ -51,10 +53,9 @@
 - [License](#license)
 - [Code of Conduct](#code-of-conduct)
 - [Credits](#credits)
 - [Versioning](#versioning)
 - [Changelog](CHANGELOG.md)
-- [Developers Documentation](https://truemail-rb.org/truemail-gem/)
 
 ## Synopsis
 
 Email validation is a tricky thing. There are a number of different ways to validate an email address and all mechanisms must conform with the best practices and provide proper validation. The Truemail gem helps you validate emails via regex pattern, presence of DNS records, and real existence of email account on a current email server.