# The Rust Programming Language
-[![Build Status](https://travis-ci.com/rust-lang/book.svg?branch=master)](https://travis-ci.com/rust-lang/book)
+![Build Status](https://github.com/rust-lang/book/workflows/CI/badge.svg)
This repository contains the source of "The Rust Programming Language" book.
## Requirements
-Building the book requires [mdBook], ideally the same 0.3.x version that
+Building the book requires [mdBook], ideally the same version that
rust-lang/rust uses in [this file][rust-mdbook]. To get it:
[mdBook]: https://github.com/rust-lang-nursery/mdBook