<script src="flutter_bootstrap.js?v=1.1" async></script>
Add the ?v=1.1 to the index.html file and update the version as needed and it will do the job. I used it for Flutter web and for others !DOCTYPE html> <html> <head> <title>Your App Title</title> <link rel="stylesheet" href="styles.css?v=1.1"> </head> <body> <script src="app.js?v=1.1"></script> </body> </html> ?v=1.1" add this to stylesheet and js file