> For the complete documentation index, see [llms.txt](https://web-token.spomky-labs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://web-token.spomky-labs.com/migration/from-v2.x-to-v3.0.md).

# From v2.x to v3.0

Contrary to upgrade a minor version (where the middle number changes) where no difficulty should be encountered, upgrade a major version (where the first number changes) is subject to significant modifications.

## Update the libraries

First of all, you have to make sure you are using the last v2.x release.

## Spot deprecations

Next, you have to verify you don’t use any deprecated class, interface, method or property. If you have PHPUnit tests, [you can easily get the list of deprecation used in your application](https://symfony.com/doc/current/components/phpunit_bridge.html).

### List of deprecations:

* `Jose\Easy\*`: the \`Easy\` component was deprecated in v2.2 and removed in v3.0

Except if you use the Easy component, you should have no trouble upgrading the libraries as this major branch is mainly an upgrade from old PHP version to PHP8.1.

## Symfony Flex

If you use the Symfony bundle and Symfony Flex, please note that Flex Recipes are now provided through a dedicated server.

It is highly recommended to declare this server within your application `composer.json` file.

```shell
composer config --json extra.symfony.endpoint '["https://api.github.com/repos/web-token/recipes/contents/index.json?ref=main", "flex://defaults"]'
```

{% hint style="info" %}
You can adapt this command line depending on the other Flex servers you are using.
{% endhint %}

## Upgrade the dependencies and the libraries

The version 3.0 now requires **PHP 8.1**. Please install this version or a newer one on your platform. Make sure the extensions are also installed. They are namely **JSON** and **MBString**. You may also need **OpenSSL** or **Sodium** depending on the algorithms you want to use.

If you require **Symfony components**, you shall have the version **5.4** or **6.x**. for each of these components.

It is now time to upgrade the libraries. In your composer.json, change all `web-token/*` dependencies from `v2.x` to `v3.0`. When done, execute `composer update`.

You can also update all other dependencies if needed. You can list upgradable libraries by calling `composer outdated`. This step is not mandatory, but highly recommended.

{% hint style="success" %}
[Rector](https://github.com/rectorphp/rector) is a very nice tool for code upgrade. We highly recommend it.
{% endhint %}


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