diff --git a/scripts/optimize-images.ts b/scripts/optimize-images.ts
index 803c54ee..ba4775e8 100644
--- a/scripts/optimize-images.ts
+++ b/scripts/optimize-images.ts
@@ -44,12 +44,14 @@ export async function optimizeImages() {
 
   // maximum number of workers is 8 in order to avoid running out of memory
   const numberOfWorkers = Math.min(cpus().length, 8);
-  const imagePool = new ImagePool(numberOfWorkers);
 
   // process smaller batches in order to reduce memory usage
   const batchSize = 32;
 
   for (let i = 0; i < imagePaths.length; i += batchSize) {
+    // use a new ImagePool for each batch to reduce memory usage
+    const imagePool = new ImagePool(numberOfWorkers);
+
     await Promise.all(
       imagePaths.slice(i, i + batchSize).map(async (imagePath) => {
         const imageStartTime = Date.now();
@@ -108,9 +110,9 @@ export async function optimizeImages() {
         );
       })
     );
-  }
 
-  await imagePool.close();
+    await imagePool.close();
+  }
 
   console.log(`TOTAL DURATION: ${getElapsedSeconds(startTime)}s`);
 }