Changelog 0.4.0 Breaking Updated to socket.io v4.6.1 (from v2.3.0): Make sure to update client, e.g., by using <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.6.1/socket.io.js"></script> 0.3.1 Last version using socket.io v2.3.0