diff --git a/.eleventy.js b/.eleventy.js
index eff68f2..ab8b0fb 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -1,4 +1,4 @@
-module.exports = (eleventyConfig) => {
+export default (eleventyConfig) => {
   eleventyConfig.addPassthroughCopy("assets");
   eleventyConfig.addPassthroughCopy("favicon*");
   return {
diff --git a/_data/octicons.js b/_data/octicons.js
index 0b3dc89..afcbad4 100644
--- a/_data/octicons.js
+++ b/_data/octicons.js
@@ -1,7 +1,7 @@
-const octicons = require("@primer/octicons");
+import octicons from "@primer/octicons";
 
 // @ts-check
-module.exports = {
+export default {
   commentDiscussion: octicons["comment-discussion"].heights[16].path,
   markGithub: octicons["mark-github"].heights[16].path,
 };
diff --git a/_data/stages.js b/_data/stages.js
index f7ce460..c6a705e 100644
--- a/_data/stages.js
+++ b/_data/stages.js
@@ -1,4 +1,4 @@
-const EleventyFetch = require("@11ty/eleventy-fetch");
+import EleventyFetch from "@11ty/eleventy-fetch";
 
 function arrayEquals(a, b) {
   return (
@@ -9,7 +9,7 @@ function arrayEquals(a, b) {
   );
 }
 
-module.exports = async () => {
+export default async () => {
   const json = await EleventyFetch("https://tc39.es/dataset/proposals.json", {
     duration: "1h", // 1 day
     type: "json", // also supports "text" or "buffer"
diff --git a/de/de.11tydata.js b/de/de.11tydata.js
index ce7ca29..fb9f957 100644
--- a/de/de.11tydata.js
+++ b/de/de.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),
diff --git a/en/en.11tydata.js b/en/en.11tydata.js
index f3f91a4..4dbf4c4 100644
--- a/en/en.11tydata.js
+++ b/en/en.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),
diff --git a/fr/fr.11tydata.js b/fr/fr.11tydata.js
index 1000d77..467b826 100644
--- a/fr/fr.11tydata.js
+++ b/fr/fr.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),
diff --git a/ja/ja.11tydata.js b/ja/ja.11tydata.js
index 961e008..f934cc0 100644
--- a/ja/ja.11tydata.js
+++ b/ja/ja.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),
diff --git a/package.json b/package.json
index 6fc0988..da787ac 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "type": "git",
     "url": "https://github.com/tc39/tc39.github.io.git"
   },
+  "type": "module",
   "scripts": {
     "prebuild": "npm run sass",
     "build": "eleventy",
diff --git a/ru/ru.11tydata.js b/ru/ru.11tydata.js
index 26eb809..bcb98dd 100644
--- a/ru/ru.11tydata.js
+++ b/ru/ru.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),
diff --git a/uk/uk.11tydata.js b/uk/uk.11tydata.js
index 9c85add..8fd8edd 100644
--- a/uk/uk.11tydata.js
+++ b/uk/uk.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),
diff --git a/zh-Hans/zh-Hans.11tydata.js b/zh-Hans/zh-Hans.11tydata.js
index 8f479c3..37a1be3 100644
--- a/zh-Hans/zh-Hans.11tydata.js
+++ b/zh-Hans/zh-Hans.11tydata.js
@@ -1,4 +1,8 @@
-module.exports = {
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
+export default {
   intro: require("./intro.json"),
   proposals: require("./proposals.json"),
   site: require("./site.json"),