diff --git a/src/gameConfig.js b/src/gameConfig.js
index b49d993..4f5dea9 100644
--- a/src/gameConfig.js
+++ b/src/gameConfig.js
@@ -3,12 +3,14 @@ import fs from "fs";
 import { pathToFileURL } from "url";
 
 import novaTerraPrime from "./tiles/novaTerraPrime.js";
+import clusterize from "./clusterize.js";
 
 export const defaultGameConfig = {
   tileSet: novaTerraPrime,
   minTiles: 10,
   timelapseLookBackPerfRun: 20,
   createTimelapse: false,
+  clusterize,
 };
 
 export const getGameConfig = async (...filenames) => {
diff --git a/src/getClusters.js b/src/getClusters.js
index 15cd729..fa28468 100644
--- a/src/getClusters.js
+++ b/src/getClusters.js
@@ -52,7 +52,7 @@ async function getClusters(repo, gameConfig) {
    * Deterministicly group files into clusters for each city block
    */
   const files = repo.map((elem) => elem.Files).flat();
-  const clusters = await clusterize(files, number_of_blocks);
+  const clusters = await gameConfig.clusterize(files, number_of_blocks);
 
   return clusters.map((cluster) => {
     const summary = {};