Three elementary schools in upstate New York are banning “Squid Game” Halloween costumes over the hit show’s “violent message.”

The restriction came after principals at the Syracuse-area Fayetteville-Manlius schools sent an email to parents, saying that students have been playing a version of the survival game depicted in the Korean Netflix series, CNY Central reported Tuesday.

The show’s signature jumpsuits, tracksuits and masks now have to go back in the closet with “Friday the 13th” and “Scream” masks, under the suburban district’s guidelines.

The wildly popular dystopian series is about deadbeats who are invited to play deadly children’s games for the promise of fast cash. 111 million viewers streamed the show in the month after its September debut, making it Netflix’s most popular show ever.