diff --git a/types/vis/index.d.ts b/types/vis/index.d.ts
index db59780fa8..9c0adb0a97 100644
--- a/types/vis/index.d.ts
+++ b/types/vis/index.d.ts
@@ -1700,6 +1700,7 @@ export interface Edge {
 export interface Locales {
   [language: string]: LocaleMessages | undefined;
   en?: LocaleMessages;
+  cn?: LocaleMessages;
   de?: LocaleMessages;
   es?: LocaleMessages;
   it?: LocaleMessages;