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 v1.x release (1.3.8).

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.

List of deprecations:

• Jose\Component\Core\JWK::create(): this static function is removed. Use the constructor instead

• Jose\Component\Core\JWKSet::createFromKeys() : this static function is removed. Use the constructor instead

• Jose\Component\Core\Converter\JsonConverter: this interface is removed. No replacement.

• Jose\Component\Core\Converter\StandardConverter: this class is removed. No replacement.

• Jose\Component\Encryption\Compression\CompressionMethodManager::create(): this static function is removed. Use the constructor instead

• Jose\Component\Encryption\Compression\GZip: this class is removed. No replacement.

• Jose\Component\Encryption\Compression\ZLib: this class is removed. No replacement.

• Jose\Component\Encryption\Serializer\JWESerializerManager::list(): this method is removed. Please use names()

• Jose\Component\Checker\ClaimCheckerManager::create() : this static function is removed. Use the constructor instead

• Jose\Component\Checker\HeaderCheckerManager::create() : this static function is removed. Use the constructor instead

• Jose\Component\Core\AlgorithmManager::create() : this static function is removed. Use the constructor instead

• Jose\Component\Encryption\Serializer\JWESerializerManager::create() : this static function is removed. Use the constructor instead

• Jose\Component\Signature\Serializer\JWSSerializerManager::create() : this static function is removed. Use the constructor instead

With the Symfony bundle, the configuration option jose.json_converter is removed.

Add missing dependencies

In v1.x, when you install the web-token/jwt-signature or web-token/jwt-encryption, the algorithms are automatically install.

In v2.0, you must explicitly install the algorithms you need. Please refer to the signature algorithms page or encryption algorithms page to know what package you need to install.

Upgrade the libraries

It is now time to upgrade the libraries. In your composer.json, change all web-token/* dependencies from v1.x to v2.0. 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.