How to convert FHIR Resources back into JSON with an Instant object

[kpuscas]

Probably a dumb question but, I've got a FHIR Parameters object that I need to convert into JSON. However getting the dictionary and then converting that with json.loads. I'm getting an error because of the lastUpdated Instant type is a datetime type and that isn't JSON serializable. Is there a better way of doing this that I'm missing?

TIA