diff --git a/.prettierrc.json b/.prettierrc.json
index 0967ef42..84cc551f 100644
--- a/.prettierrc.json
+++ b/.prettierrc.json
@@ -1 +1,4 @@
-{}
+{
+  "$schema": "https://json.schemastore.org/prettierrc",
+  "singleQuote": true
+}
diff --git a/eslint.config.js b/eslint.config.js
index aae7129b..6f4f11ed 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -25,12 +25,7 @@ export default tseslint.config(
     rules: {
       'n/no-missing-import': 'off', // bug with recognizing node: prefix https://github.com/mysticatea/eslint-plugin-node/issues/275
 
-      'prettier/prettier': [
-        'error',
-        {
-          singleQuote: true,
-        },
-      ],
+      'prettier/prettier': 'error', // see `.prettierrc.json` for format config
 
       // unicorn rules:
       'unicorn/expiring-todo-comments': 'off',