When working on some projects, sometimes you need the stability of your environment. Updating a package can cause the entire project to fail. Sometimes, we accidentally upgrade those packages which and this creates a serious issue on the server. This is why it can be important to maintain a specific version of a package. This article will show you how you can exclude a specific package from the upgrade on Ubuntu 16.04

Source: How to Exclude Specific Package from apt-get Upgrade (LinOxide)