diff --git a/electron/main/script.js b/electron/main/script.js
index b259041..c9f35f5 100644
--- a/electron/main/script.js
+++ b/electron/main/script.js
@@ -242,7 +242,7 @@ function loadSpeakerAudio(option){
 
 function activateSubmitBtn(hasFile){
   try {
-    submitButton.disabled = !hasFile;
+    document.getElementById("submitButton").disabled = !hasFile;
   } catch (error) {
     console.log(error);
   }