diff --git a/src/App.js b/src/App.js
index e47c81c..c13d75a 100644
--- a/src/App.js
+++ b/src/App.js
@@ -3,7 +3,7 @@ import { useCallback, useEffect, useRef, useState } from "react";
 import WaveForm from "./WaveForm";
 
 const App = () => {
-  const [audioUrl, setAudioUrl] = useState(),
+  const [audioUrl, setAudioUrl] = useState(''),
     [analyzerData, setAnalyzerData] = useState(null),
     [bounce, setBounce] = useState(''),
     [json, setJson] = useState({}),