ST. LOUIS (AP) — Busch Stadium has installed walk-through metal detectors at every entry gate in order to comply with Major League Baseball’s new rule that all spectators be scanned before entering any of its 30 stadiums.

The St. Louis Post-Dispatch reports that MLB issued the order after conferring with the Department of Homeland Security.

The new security system has been met with mixed reactions by fans with some saying that it is a disappointing, but necessary measure. Others said that they were surprised the stadium did not have the detectors in place already.

The home of the St. Louis Cardinals previously used hand-held wands to scan a random sample of people entering the stadium.