Business owner: take out of ISA or pay extra dividend

Hey! First time posting here!

I run my own business and it’s doing well. Currently I take the £37,700 a year dividend and I have £50,000 in ISA.

I’m getting married so will likely need a larger amount of money than £37,700.

The tax for extra dividends is 33.75% so should I use the money I have up in ISA first instead of paying the dividend?