diff --git a/lib/schema.js b/lib/schema.js
index fed01d1..a921b82 100644
--- a/lib/schema.js
+++ b/lib/schema.js
@@ -1,4 +1,5 @@
-import { getChildDirectories, writeFile } from './io.js';
+import { writeFile } from 'fs/promises';
+import { getChildDirectories } from './io.js';
 import { log } from './log.js';
 
 const ctx = 'schema.js';