diff --git a/acorn-loose/rollup.config.mjs b/acorn-loose/rollup.config.mjs
index d72ad54dc..bde47ddc1 100644
--- a/acorn-loose/rollup.config.mjs
+++ b/acorn-loose/rollup.config.mjs
@@ -1,8 +1,8 @@
+import {readFile, writeFile} from "node:fs/promises"
 import buble from "@rollup/plugin-buble"
-import {promises as fs} from "node:fs"
 
 const copy = (from, to) => ({
-  async writeBundle() { await fs.writeFile(to, await fs.readFile(from)) }
+  async writeBundle() { await writeFile(to, await readFile(from)) }
 })
 
 export default {
diff --git a/acorn-walk/rollup.config.mjs b/acorn-walk/rollup.config.mjs
index 878bbbd32..8fb866641 100644
--- a/acorn-walk/rollup.config.mjs
+++ b/acorn-walk/rollup.config.mjs
@@ -1,8 +1,8 @@
+import {readFile, writeFile} from "node:fs/promises"
 import buble from "@rollup/plugin-buble"
-import {promises as fs} from "node:fs"
 
 const copy = (from, to) => ({
-  async writeBundle() { await fs.writeFile(to, await fs.readFile(from)) }
+  async writeBundle() { await writeFile(to, await readFile(from)) }
 })
 
 export default {
diff --git a/acorn/rollup.config.mjs b/acorn/rollup.config.mjs
index 42402c4ad..4e4e9c960 100644
--- a/acorn/rollup.config.mjs
+++ b/acorn/rollup.config.mjs
@@ -1,8 +1,8 @@
+import {readFile, writeFile} from "node:fs/promises"
 import buble from "@rollup/plugin-buble"
-import {promises as fs} from "node:fs"
 
 const copy = (from, to) => ({
-  async writeBundle() { await fs.writeFile(to, await fs.readFile(from)) }
+  async writeBundle() { await writeFile(to, await readFile(from)) }
 })
 
 export default [