How you buy your Walt Disney World tickets — and how much you pay for them — will be changing next month.

Disney announced that beginning Oct. 16, guests will visit a new “online vacation-planning destination” to purchase tickets “priced by the date of visit.”

This means that multiday tickets at Disney World could be more expensive depending on the time of year you’re visiting, mimicking the flexible pricing structure already in place for one-day tickets. Single-day, one-park tickets will range between $109 and $129 (up from $102 to $129).

Disney did not disclose how much prices for multiday tickets will increase, but a company spokesperson said those rates will be set in advance and will not fluctuate.

“As our parks have increased in popularity, there are more and more guests who wish to experience our world-class attractions,” Thomas Smith, editorial content director for Disney parks, wrote on the Disney Parks Blog. “Introducing date-based tickets and pricing will allow us to better distribute attendance throughout the year so that we can continue to improve and deliver a great experience.”

Through the new site, Disney will offer an interactive calendar so guests can select a start date for their visit and how long they’ll be staying before seeing a total price for their tickets. Guests will be able to see the lowest-priced days within a month, which usually fall during off-peak travel periods. Tickets will have to be used during a specific time frame.

Admission to Disney parks can still be purchased at ticket windows, guest relations, the call-in reservation hotline and through third-party vendors.

One noticeable change will affect single-day tickets. Since 2016, one-day admissions to the Magic Kingdom have been more expensive than tickets to Epcot, Disney’s Hollywood and Disney’s Animal Kingdom. That will end after Oct. 16, with all four Disney World parks once again equal in price.