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Update your Rails version to 5.2

Spree 3.6 requires Rails 5.2 at a minimum. Please follow the official Rails guide to upgrade your application.

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Update gems

bundle update

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(Optional) Migrate to ActiveStorage (optional)

Please follow the official paperclip guide if you want to use ActiveStorage instead of paperclip. You can still use paperclip for attachment management by setting SPREE_USE_PAPERCLIP environment variable to true, but keep in mind that paperclip is DEPRECATED and we will remove paperclip support in Spree 4.0.

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Install missing migrations

rake railties:install:migrations

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Run migrations

rails db:migrate
You’re good to go!

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Read the release notes

For information about changes contained within this release, please read the 3.6.0 Release Notes.