Developer Techland today announced that the price of Dying Light‘s upcoming expansion and DLC pass is going up. Previously sold for $20, the Polish studio now plans to charge $30 for the season pass. This price hike is the result of an increase in scale for the the zombie game’s upcoming expansion, The Following, which, too, has gone up in price from $15 to $20.

“Over the past weeks, Dying Light: The Following has almost reached its final stage: main quests, side quests, new skills, and driving challenges are ready,” the developer said. “We now are moving into the polishing period. Looking at it, it’s clear how big the expansion pack has grown–it could be a standalone title, but since it would mean a launch delay, we decided against it.

“However, due to the increased scale of the project, we needed to revise the pricing that we announced back in August, and so we want to let you know that Dying Light: The Following will be priced at $20.”

The Dying Light DLC pass is thus being adjusted accordingly to the new price of $30.

The price change will go into effect on December 8. People who already own the DLC pass, or those who buy it before December 8, will not be asked to pay more.

The Following is a story-based expansion in which protagonist Kyle Crane (voiced by Assassin’s Creed and Batman voice actor Roger Craig Smith) travels to the outback. While there he meets “mysterious and fanatical cultists” that have information about the zombie outbreak.

The expansion also adds vehicles to the game, one of which is a dirt buggy. This is customizable, upgradable, and features its own skill tree. Techland called the dirt buggy Dying Light’s “deadliest weapon yet.” The expansion is slated to arrive in the January-March window of 2016.