diff --git a/client/views/admin/mailer/Mailer.js b/client/views/admin/mailer/Mailer.js
index 16aa010da5b5..60f2babd3fdf 100644
--- a/client/views/admin/mailer/Mailer.js
+++ b/client/views/admin/mailer/Mailer.js
@@ -10,8 +10,8 @@ import {
 } from '@rocket.chat/fuselage';
 import React, { useState, useCallback } from 'react';
 
-import { isJSON } from '../../../../app/utils/lib/isJSON';
 import { isEmail } from '../../../../lib/utils/isEmail';
+import { isJSON } from '../../../../lib/utils/isJSON';
 import Page from '../../../components/Page';
 import { useTranslation } from '../../../contexts/TranslationContext';
 
diff --git a/app/utils/lib/isJSON.js b/lib/utils/isJSON.ts
similarity index 57%
rename from app/utils/lib/isJSON.js
rename to lib/utils/isJSON.ts
index ce5547a312b6..92820cd8c2d1 100644
--- a/app/utils/lib/isJSON.js
+++ b/lib/utils/isJSON.ts
@@ -1,4 +1,4 @@
-export const isJSON = (value) => {
+export const isJSON = (value: string): boolean => {
 	try {
 		return !!JSON.parse(value);
 	} catch {