No need to upgrade the DAC, Matt, assuming it provides an interface that can be connected to the signal source. It would be extremely unusual for a DAC that can handle 24/96 to not also be able to handle 16/44.1, which is a much lower bit rate. I'm not familiar with Deezer, but I don't doubt that Mofi is correct about it being 16/44.1, like Tidal.
Regards,
-- Al
Regards,
-- Al