README.md in sec_id-3.0.0 vs README.md in sec_id-4.0.0

- old
+ new

@@ -1,9 +1,8 @@
 # SecId
 [![Gem Version](https://badge.fury.io/rb/sec_id.svg)](https://badge.fury.io/rb/sec_id)
-[![Build Status](https://travis-ci.org/svyatov/sec_id.svg?branch=master)](https://travis-ci.org/svyatov/sec_id)
-[![Depfu](https://badges.depfu.com/badges/ccb54ed1642be2d4d102b83d7d6a604c/overview.svg)](https://depfu.com/github/svyatov/sec_id?project_id=6878)
+![Build Status](https://github.com/svyatov/sec_id/actions/workflows/main.yml/badge.svg?branch=main)
 [![Maintainability](https://api.codeclimate.com/v1/badges/a4759963a5ddc4d55b24/maintainability)](https://codeclimate.com/github/svyatov/sec_id/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/a4759963a5ddc4d55b24/test_coverage)](https://codeclimate.com/github/svyatov/sec_id/test_coverage)
 
 Validate securities identification numbers with ease!
 
@@ -20,10 +19,10 @@
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'sec_id', '~> 2.0'
+gem 'sec_id', '~> 4.0'
 ```
 
 And then execute:
 
     $ bundle