Hello Harry,
As Ann says the answer is yes. What you need depends on the type of connection system you currently have.
Older caravans will have a regulator that screws or clips directly to the butane bottle. If this is your system you willneed to get a propane regulator and have it fitted to your low pressure pipe.
If you have a more recent caravan where the regulator is fixed to the bulk head, then you wll need to have a new propane pig tail fitted.
Neither should cost a lot budget about