diff --git a/lib/lang.js b/lib/lang.js
index 0b4f3883..aafc08ec 100644
--- a/lib/lang.js
+++ b/lib/lang.js
@@ -6,19 +6,19 @@ import { enUS, nl, zhCN } from 'date-fns/locale';
 
 export const messages = {
   en: enMessages,
-  nl: nlMessages,
+  'nl-NL': nlMessages,
   'zh-CN': zhCNMessages,
 };
 
 export const dateLocales = {
   en: enUS,
-  nl: nl,
+  'nl-NL': nl,
   'zh-CN': zhCN,
 };
 
 export const menuOptions = [
   { label: 'English', value: 'en', display: 'EN' },
-  { label: 'Nederlands', value: 'nl', display: 'NL' },
+  { label: 'Nederlands', value: 'nl-NL', display: 'NL' },
   { label: '中文 (Chinese Simplified)', value: 'zh-CN', display: '中文' },
 ];