Today, we are announcing the deprecation of versions v201108 , v201111 , and v201201 of the DFP API. In roughly 3 months, on Dec 10th , these versions will be turned off. Turning off older versions allows us to make sure that everyone can benefit from the improvements in more recent releases and to focus on releasing new features. Although we are not announcing the deprecation of any other versions at this time, we would still like to give our developers using v201203, v201204, and v201206 notice that those versions will most likely be deprecated next. Upgrading to v201208 now will reduce any future development time needed for an upgrade later. As mentioned in previous deprecation announcements, we will always give at least 3 months notice before turning off a version. Our release notes page also contains changelogs for each version, which will help you migrate to a newer version. If you aren’t using one of our client libraries , now would be a great time to start as well. If you have any feedback or comments about this deprecation, or the API in general, please feel free to leave them on our forum . - Adam Rogal , DFP API Team