TeamCity Nuget Feed URL on server migration not updated

Hi,

We've migrated servers for TeamCity and upgraded from 9.1.3 to 2017.1.5. I've noticed the TeamCity nuget feed under Administration>'NuGet feed' is still pointing at the original server? We've got round this by creating a CNAME DNS entry to link the old server to the new one.

How do we go about correcting this?

Thanks,

Chris