diff --git a/examples/end-to-end/custom-backend-task.ts b/examples/end-to-end/custom-backend-task.ts
index 86e805de..dd89bca6 100644
--- a/examples/end-to-end/custom-backend-task.ts
+++ b/examples/end-to-end/custom-backend-task.ts
@@ -1,6 +1,6 @@
 import kleur from "kleur";
-import fs from "fs";
-import path from "path";
+import fs from "node:fs";
+import path from "node:path";
 
 kleur.enabled = true;
 
diff --git a/generator/src/cli.js b/generator/src/cli.js
index e9b15dd8..291473f2 100755
--- a/generator/src/cli.js
+++ b/generator/src/cli.js
@@ -5,8 +5,8 @@ import * as build from "./build.js";
 import * as dev from "./dev-server.js";
 import * as init from "./init.js";
 import * as codegen from "./codegen.js";
-import * as fs from "fs";
-import * as path from "path";
+import * as fs from "node:fs";
+import * as path from "node:path";
 import { restoreColorSafe } from "./error-formatter.js";
 import * as renderer from "./render.js";
 import { globbySync } from "globby";
diff --git a/generator/src/codegen.js b/generator/src/codegen.js
index ed86bcc4..48112e3a 100644
--- a/generator/src/codegen.js
+++ b/generator/src/codegen.js
@@ -1,4 +1,4 @@
-import * as fs from "fs";
+import * as fs from "node:fs";
 import * as fsExtra from "fs-extra/esm";
 import { rewriteElmJson } from "./rewrite-elm-json.js";
 import { rewriteClientElmJson } from "./rewrite-client-elm-json.js";
diff --git a/generator/src/copy-dir.js b/generator/src/copy-dir.js
index ca6c5a61..cc82186b 100644
--- a/generator/src/copy-dir.js
+++ b/generator/src/copy-dir.js
@@ -1,5 +1,5 @@
-const util = require("util");
-const fsSync = require("fs");
+const util = require("node:util");
+const fsSync = require("node:fs");
 const fs = {
   writeFile: util.promisify(fsSync.writeFile),
   mkdir: util.promisify(fsSync.mkdir),
diff --git a/generator/src/dir-helpers.js b/generator/src/dir-helpers.js
index cf2d3f1a..839a20f0 100644
--- a/generator/src/dir-helpers.js
+++ b/generator/src/dir-helpers.js
@@ -1,6 +1,6 @@
-import * as util from "util";
-import * as fsSync from "fs";
-import * as path from "path";
+import * as util from "node:util";
+import * as fsSync from "node:fs";
+import * as path from "node:path";
 
 const fs = {
   writeFile: util.promisify(fsSync.writeFile),
@@ -75,4 +75,3 @@ export async function copyDirNested(src, dest) {
     fs.copyFile(src, dest);
   }
 }
-
diff --git a/generator/src/file-helpers.js b/generator/src/file-helpers.js
index eb293d3e..9bde5c2f 100644
--- a/generator/src/file-helpers.js
+++ b/generator/src/file-helpers.js
@@ -1,4 +1,4 @@
-import * as fs from "fs";
+import * as fs from "node:fs";
 
 export function ensureDirSync(dirpath) {
   try {
diff --git a/generator/src/render-worker.js b/generator/src/render-worker.js
index ddf59e0f..96aa0848 100644
--- a/generator/src/render-worker.js
+++ b/generator/src/render-worker.js
@@ -1,9 +1,9 @@
 import * as renderer from "../../generator/src/render.js";
-import * as path from "path";
+import * as path from "node:path";
 import * as fs from "./dir-helpers.js";
-import { readFileSync, writeFileSync } from "fs";
+import { readFileSync, writeFileSync } from "node:fs";
 import { stat } from "fs/promises";
-import { parentPort, threadId, workerData } from "worker_threads";
+import { parentPort, threadId, workerData } from "node:worker_threads";
 import * as url from "url";
 
 async function run({ mode, pathname, serverRequest, portsFilePath }) {
diff --git a/generator/src/render.js b/generator/src/render.js
index 5c494dd9..f3a250fd 100755
--- a/generator/src/render.js
+++ b/generator/src/render.js
@@ -1,16 +1,16 @@
 // @ts-check
 
-import * as path from "path";
+import * as path from "node:path";
 import { default as mm } from "micromatch";
 import { default as matter } from "gray-matter";
-import * as fsPromises from "fs/promises";
 import * as globby from "globby";
+import * as fsPromises from "node:fs/promises";
 import * as preRenderHtml from "./pre-render-html.js";
 import { lookupOrPerform } from "./request-cache.js";
 import * as kleur from "kleur/colors";
 import * as cookie from "cookie-signature";
 import { compatibilityKey } from "./compatibility-key.js";
-import * as fs from "fs";
+import * as fs from "node:fs";
 import * as crypto from "node:crypto";
 
 process.on("unhandledRejection", (error) => {
diff --git a/generator/src/rewrite-client-elm-json.js b/generator/src/rewrite-client-elm-json.js
index 9e658075..24d8baab 100644
--- a/generator/src/rewrite-client-elm-json.js
+++ b/generator/src/rewrite-client-elm-json.js
@@ -1,4 +1,4 @@
-import * as fs from "fs";
+import * as fs from "node:fs";
 
 export async function rewriteClientElmJson() {
   var elmJson = JSON.parse(
diff --git a/generator/src/rewrite-elm-json.js b/generator/src/rewrite-elm-json.js
index d9bf5e04..1ce1abf8 100644
--- a/generator/src/rewrite-elm-json.js
+++ b/generator/src/rewrite-elm-json.js
@@ -1,4 +1,4 @@
-import * as fs from "fs";
+import * as fs from "node:fs";
 
 export async function rewriteElmJson(sourceElmJsonPath, targetElmJsonPath) {
   var elmJson = JSON.parse(