diff --git a/documentation/docs/api/event-system.md b/documentation/docs/api/event-system.md
index 63e98513..521c813b 100644
--- a/documentation/docs/api/event-system.md
+++ b/documentation/docs/api/event-system.md
@@ -150,7 +150,7 @@ A basic implementation could look something like this. In the following example
 <TabItem value="App.jsx" label="App.jsx">
 
 ```jsx showLineNumbers title="App.jsx"
-import React, { Fragment, useState } from "react";
+import React, { Fragment, useState, useCallback, useEffect } from "react";
 import { Unity, useUnityContext } from "react-unity-webgl";
 
 function App() {