Please, try to understand me. Once again. I have Plesk 17.5.3 version on CentOS7:
# plesk version
Product version: Plesk Onyx 17.5.3 Update #39
Update date: 2018/01/31 05:29
Build date: 2017/03/17 16:00
OS version: CentOS 7.2.1511
Revision: 55d1b49a272f44666e1920eca8b6e4da449a38cd
Architecture: 64-bit
Wrapper version: 1.2
I have installed PostgreSQL through Plesk installer:
I see that this is package not from Plesk, but from CentOS OS vendor's repository:
# rpm -qi postgresql
Name : postgresql
Version : 9.2.23
Release : 3.el7_4
Architecture: x86_64
Install Date: Wed 31 Jan 2018 05:19:10 AM NOVT
Group : Applications/Databases
Size : 16694158
License : PostgreSQL
Signature : RSA/SHA256, Sat 09 Dec 2017 01:14:31 AM NOVT, Key ID 24c6a8a7f4a80eb5
Source RPM : postgresql-9.2.23-3.el7_4.src.rpm
Build Date : Fri 08 Dec 2017 10:53:17 PM NOVT
Build Host : c1bm.rdu2.centos.org
Relocations : (not relocatable)
Packager : CentOS BuildSystem <My View - CentOS Bug Tracker>
Vendor : CentOS
URL :
PostgreSQL: The world's most advanced open source database
Summary : PostgreSQL client programs
So, if you need PostgreSQL server 9.5 version - you need to find any third-party CentOS7 repository where this version exists, add and enable this repository for your server and install/upgrade PostgreSQL 9.5 from this third-party repository. After that go to Tools&Settings -> Server Components and click Refresh button. After that check that version of PostgreSQL on your server listed as 9.5 and start to use it.