Airbnb said it will use its “anti-party technology” to block certain bookings over the upcoming Halloween weekend.

The system uses automation to detect potential party risks based on factors such as the length of a reservation and last-minute booking requests.

Last year, Airbnb deterred about 38,000 bookings in the United States and about 6,300 in Canada using the technology. This is the sixth year Airbnb has used the system, and the company said party-related reports have declined.

Higher-risk bookings may be blocked, and guests will have the option of reserving “alternative accommodations,” such as a private room where a host is present.

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Airbnb requires all users to be at least 18 years old,

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