The Facebook Business SDK follows the same release cycle as the Graph API. New versions will be generated with a new release of the APIs. The SDK will have only one active version meaning we will not support bug fixes for older versions. Subversions of the active version are supported. For example, the active version is 3.0 but a bug was found; we will release the fix in the 3.0.1 subversion. Please refer to the Graph API Changelog for version release dates.