minor release including fixes in code and documentation since
v5.5.3. The configuration file and database schema compatibility is
preserved, which means you don’t have to change anything to update.

Kamailio® v5.5.4 is based on the latest source code of GIT branch 5.5
and it represents the latest stable version. We recommend those running
previous 5.5.x or older versions to upgrade.
There is no change that has to be done to configuration file or database
structure comparing with the previous releases of the v5.5 branch.