How do I avoid imperva bot detection?

I am running a Python script that scrapes a website. It uses Imperva to detect automated scripts crawling through it's web pages. Imperva has blocked my IP from accessing the site as soon as I run the script. I did read someone suggest including a time.sleep(random.randint(a,b)) (to try and mimic human behaviour) in the script which it didn't work or perhaps it just wouldn't work as a standalone method. If it's the chrome driver itself that they detect then I guess it would be impossible to avoid. Does anyone have any practical suggestions on things that I could include in my script to bypass this?. Thanks in advance.