Postgresql93 was updated to 9.3.18 to fix the following issues:
The changelog for the release is here:
https://www.postgresql.org/docs/9.3/static/release-9-3-18.html
{ "binaries": [ { "postgresql93-contrib": "9.3.18-25.5.1", "postgresql93": "9.3.18-25.5.1", "postgresql93-server": "9.3.18-25.5.1", "postgresql93-docs": "9.3.18-25.5.1" } ] }