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--- a/README.md
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 # Engine.IO client
 
-[![Build Status](https://github.com/socketio/engine.io-client/workflows/CI/badge.svg)](https://github.com/socketio/engine.io-client/actions)
+[![Build Status](https://github.com/socketio/engine.io-client/workflows/CI/badge.svg?branch=master)](https://github.com/socketio/engine.io-client/actions)
 [![NPM version](https://badge.fury.io/js/engine.io-client.svg)](http://badge.fury.io/js/engine.io-client)
 
 This is the client for [Engine.IO](http://github.com/socketio/engine.io),