Can I upgarde 5.0 to 5.1a?

Hi

Ive gone through the release notes and just a little confused about the upgrade path . Hope someone can help me

Can I upgrade from Vcenter 5.0 to 5.1a directly or do I have upgrade 5.0 to 5.1 and  then 5.1 to 5.1a ?

Thanks

Mumtaz