Have you checked your application at www.virustotal.com ?

Post link to scan result here and we may notify avast lab

How to report https://forum.avast.com/index.php?topic=14433.msg1289438#msg1289438

How can I prevent this from happening to my application? Is there any code I can change to prevent this?
https://www.avast.com/faq.php?article=AVKB229#artTitle

https://www.avast.com/faq.php?article=AVKB228#artTitle