PostgreSQL was updated to 9.6.9 fixing bugs and security issues:
Release notes:
https://www.postgresql.org/docs/current/static/release-9-6-9.html
A dump/restore is not required for those running 9.6.X. However, if you use the adminpack extension, you should update it as per the first changelog entry below. Also, if the function marking mistakes mentioned in the second and third changelog entries below affect you, you will want to take steps to correct your database catalogs.
Security issue fixed: