Moving from CF 8 directly to CF 10?

Hello,

We currently have multiple applications written in Coldfusion 8, using Postgresql 8.4 on a server running Redhat Linux 5, and it all needs to be upgraded.  I am currently building a new server with Redhat Linux 6, and plan to put Posgresql 9 on it, and I will be moving all the Coldfusion code over to this new server.  I received a free copy of Coldfusion 10.  Will my code work on 10, or do I have to go to CF 9 instead?

Thanks!

Julie