diff --git a/i18next/i18next.d.ts b/i18next/i18next.d.ts
index 5e2f8dcd20..07517c1e2c 100644
--- a/i18next/i18next.d.ts
+++ b/i18next/i18next.d.ts
@@ -119,6 +119,8 @@ declare namespace I18next {
         createInstance(options?:Options, callback?:(err:any, t:TranslationFunction) => void):I18n;
 
         cloneInstance(options?:Options, callback?:(err:any, t:TranslationFunction) => void):I18n;
+
+        on(event: string, listener: (options: I18next.Options) => void ): void;
     }
 }