# News: Channel access token v2.1 released

Channel access token v2.1 released

We released the latest version of the channel access token. This new version lets the user specify the expiration date and also provides security enhancements by switching to using a JSON Web Token (JWT) instead of the channel secret.

We recommend using the latest version of the channel access token.

Generate a JWT

You can use any JWT library or write your own code from scratch to Generate a JWT from your Assertion Signing Key. This is a necessary step in the Issue channel access token v2.1 API.

# New APIs

To learn the difference between the currently available channel access tokens, read Channel access tokens in the Messaging API documentation.