It appears 0505 is the newest bios, when I clicked on the 4790k in their cpu support list that's the version they recommend despite saying supported since bios 0208. 0505 came out in 2015 so it should be fine. Some h81 boards had older bios versions that didn't offer full support for the haswell refresh and devil's canyon cpu's which is why I mentioned checking it. You should be fine.
Had to look at their listing for it since the numbers don't really reveal much on their own as far as which one was newer. Other brands/models use different names for their bios versions that generally include the date they were released and makes it easier to tell at a glance which is which.