Cost inferior to 1 are rounded to 0

Hi, I wuld like to be able to charge 0.08 $ per bottle, but prices are rounded to zero when converting few bottles. I'm using vault and cmi for my economy. There is my bottledexp's config (only economy values):

  # Do you want to charge money for xp conversion
  useMoney: true
  # How much it will gonna cost
  moneyCost: 0.08
  # Do you want to show extra information for how much its gonna cost to level up
  useBottleMoney: true
  # How much one xp bottle costs
  bottleCost: 0.08

BottledExp verison : 3.1.1.0 Cmi : 8.2.5.3 (with vault provided)

There's a screen to show what going on (sorry it's in french) bottle_conversion

Zrips / BottledExp

Cost inferior to 1 are rounded to 0 #31