Please don't make this into a franchise

Rating: 8/10 (8 July 2018)

Finally something original and good! That's hard to come by in this age of prequels, sequels, reimaginings, reboots, spin offs and adaptations of everything from books and comics to board games and amusement park rides.
The acting is strong and the directing is superb. The silence really works wonders, it creates a tense atmosphere. But what are the chances it will work again in a (inevitable?) sequel?
I hope they don't make sequels and turn this gem into a franchise. How many horror franchises can you name that have not come with diminishing returns?