diff --git a/eleventy.config.js b/eleventy.config.js
index 63b8b02..3102604 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -23,6 +23,7 @@ import markdownItFootnote from 'markdown-it-footnote';
 import markdownItImageFigures from 'markdown-it-image-figures';
 
 const MARKDOWNIT_OPTIONS = { html: true, linkify: true, typographer: true };
+Image.concurrency = 4;
 
 export default async function (eleventyConfig) {
   eleventyConfig.addPassthroughCopy('./src/css/prism.css');