Couchbase Server supports upgrade paths from one major version to another.
Be aware of the currently supported versions and versions at or near their end of life. The support information is available in the Couchbase Support Policy.
The following table shows some commonly supported upgrade paths:
|Current version||Target version||Process|
|2.5.x||3.x||Upgrade from version 2.5.x directly to the latest version 3.x using any supported upgrade strategy.|
|3.x||4.x||Upgrade from the latest version 3.x directly to version 4.x using any supported upgrade strategy.|
|2.5.x||4.x||Upgrade from the latest version 2.5.x directly to version 4.x using any supported upgrade strategy.|
|4.0||4.x (> 4.0)||Services require more planning during an upgrade.|