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Preparing your site to upgrade to a newer major version

Keeping up with minor Drupal core releases is the best way to prepare for upgrading to a new major version.

You can upgrade to a new major version from the last minor version of the previous major version. Note that Drupal 10 is an exception. Upgrades to Drupal 10 are supported from Drupal 9.4 or later.

Numerous automated tools can help you prepare for a new major version.

Deprecation checking and correction tools to prepare for a new Drupal major version

There are several automated tools to find and fix deprecations in your codebase.

Preparing Drupal.org projects for Drupal 9

There are certain considerations you should keep in mind when preparing drupal.org projects for Drupal 9.

Preparing for use of Twig 2 in Drupal 9

How to prepare your Drupal 8 site/project for the transition from Twig 1 to Twig 2.

Guide maintainers

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