diff --git a/package.json b/package.json
index 9452822ab2..56bc50c535 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "license": "W3C",
   "description": "A technical specification pre-processor.",
   "engines": {
-    "node": ">=8",
+    "node": ">=10",
     "npm": ">=5"
   },
   "bin": {
diff --git a/tools/builder.js b/tools/builder.js
index 5405eec25c..5dd8648b58 100755
--- a/tools/builder.js
+++ b/tools/builder.js
@@ -2,7 +2,7 @@
 
 "use strict";
 const colors = require("colors");
-const fsp = require("fs-extra");
+const { promises: fsp } = require("fs");
 const path = require("path");
 const webpack = require("webpack");
 const { promisify } = require("util");
@@ -13,7 +13,7 @@ colors.setTheme({
   info: "white",
 });
 
-/** @type {import("command-line-args").OptionDefinition[]} */
+/** @type {import("command-line-usage").OptionDefinition[]} */
 const optionList = [
   {
     alias: "h",
diff --git a/tools/release.js b/tools/release.js
index 1a56b0b131..7b9937d221 100755
--- a/tools/release.js
+++ b/tools/release.js
@@ -4,7 +4,7 @@ const { Builder } = require("./builder");
 const cmdPrompt = require("prompt");
 const colors = require("colors");
 const { exec } = require("child_process");
-const fsp = require("fs-extra");
+const { promises: fsp } = require("fs");
 const loading = require("loading-indicator");
 const path = require("path");
 const MAIN_BRANCH = "develop";
diff --git a/tools/respec2html.js b/tools/respec2html.js
index 44ea99f204..5d113e2cdb 100755
--- a/tools/respec2html.js
+++ b/tools/respec2html.js
@@ -2,7 +2,6 @@
 
 /* jshint node: true, browser: false */
 "use strict";
-const { URL } = require("url");
 const colors = require("colors");
 const fetchAndWrite = require("./respecDocWriter").fetchAndWrite;
 colors.setTheme({
diff --git a/tools/respecDocWriter.js b/tools/respecDocWriter.js
index 6edfc01926..e92b4508bc 100644
--- a/tools/respecDocWriter.js
+++ b/tools/respecDocWriter.js
@@ -9,12 +9,8 @@
 const os = require("os");
 const puppeteer = require("puppeteer");
 const colors = require("colors");
-const { promisify } = require("util");
-const fs = require("fs");
-const writeFile = promisify(fs.writeFile);
-const mkdtemp = promisify(fs.mkdtemp);
+const { mkdtemp, writeFile } = require("fs").promises;
 const path = require("path");
-const { URL } = global.URL ? { URL: global.URL } : require("url");
 colors.setTheme({
   debug: "cyan",
   error: "red",