It’s been a while since I’ve updated Pushl but today I released v0.1.6. It includes the following fixes:

• Now it supports Pingback as well as Webmention
• Improved the threading defaults and connection pooling
• Also checks entries for updates even if the feed didn’t change (in case something changed in the more text or page metadata or whatever)

Anyway, it should just be a pip install --upgrade pushl (or pipenv update) away.