diff --git a/scripts/optimize-images.ts b/scripts/optimize-images.ts
index 4eb95848..51b6d8a2 100644
--- a/scripts/optimize-images.ts
+++ b/scripts/optimize-images.ts
@@ -4,6 +4,7 @@
 
 // TODO: upgrade libsquoosh once types are available: https://github.com/GoogleChromeLabs/squoosh/issues/1077
 
+import { cpus } from "os";
 import path from "path";
 
 // eslint-disable-next-line @typescript-eslint/ban-ts-comment
@@ -29,7 +30,7 @@ export async function optimizeImages() {
   const imagePaths = await getFilePathsInDirectory(IMAGES_SOURCE_DIRECTORY);
   await fse.emptyDir(IMAGES_DESTINATION_DIRECTORY);
 
-  const imagePool = new ImagePool();
+  const imagePool = new ImagePool(cpus().length);
 
   await Promise.all(
     imagePaths.map(async (imagePath) => {