How do I have the Product version displayed in the MSI file properties (as displayed by Windows Explorer)?

Our installer is created using WiX. All we see is the product GUID displayed as the Revision Number in the Details tab of the MSI file properties.

We'd like to have the product version (e.g.: `5.0.1.12345`) so that the support team (and customers) can easily check the version of a given file.