Barstool Sportsbook is in the midst of several days of shutdown of betting, deposits, and withdrawals while it overhauls its platform with new technology.

The sportsbook’s customers in 16 states were informed by email late Friday of the shutdown, which began Sunday evening to take advantage of the slow sports calendar coinciding annually with MLB’s All-Star break. The maintenance period in which no logins or sports betting are possible could take up to 72 hours, customers were told.

The site currently displays an “Under Maintenance” message that explains, “We are currently upgrading the Barstool Sportsbook to bring you an improved app experience with more markets and wagering options.”