Debian Package Repository Key expired

If you are getting the this error:

Failed to fetch https://packages.knocknoc.io/debian/dists/bookworm/InRelease 
The following signatures were invalid: EXPKEYSIG E3AB5DF76BBF701F Knocknoc Support <support@knocknoc.io>

You may have the old knocknoc packages key, which expired 07/10/2025 after two years of hard labour. We have refreshed the key, so you simply need to run:

curl https://packages.knocknoc.io/key/knocknoc_public_key.asc | sudo tee /etc/apt/keyrings/knocknoc-pub.asc

This will refresh the key from our packages repository and your apt update will work again.