Prerequisites
A: User must be logged in.

By making a package official, its dependencies will be locked. This essentially means that your package is officially ready to be used by other packages dependent on it.

1. Select a Package.

2. On package details page with "Dependencies" tab on, click on "Status " button.
NOTE: "Status" button will be disabled of package is already released.

3. You will be asked to confirm your action, so click OK button.

Package is now official.
See how

See also
Create New Package Version, Export Dependency List