HELP with Oculus Intergration v1.34

Im trying to install the Oculus Intergration v1.34 asset package. At the top of the asset store page it says that I purchased this item todays date,, The Download button on the page is Greyed out with writing below that says "Needs Unity upgrade to version 2017.4.11 . Yet my Unity version is up to date 5.6.5p4 . Any help would be greatly apprectiated. I just want to install this asset package !