repo package update and psycopg2

I got the repo package update but I think I'm seeing an unintended
consequence. I have psycopg2 installed and when I went to update it, it
pulled the version of the package from pgdg11, which then pulled in libs
from pgdg11 as well. I wasn't expecting that. Was this behavior
intentional? What if I don't want postgresql11-libs?

yum transaction attached (this was on a server that previously had
postgresql94-libs installed)

sudo yum update python-psycopg2
Loaded plugins: product-id, search-disabled-repos, subscription-manager
Resolving Dependencies
--> Running transaction check
---> Package python-psycopg2.x86_64 0:2.7.5-1.rhel7 will be updated
---> Package python-psycopg2.x86_64 0:2.7.5-1.rhel7.1 will be an update
--> Processing Dependency: postgresql11-libs for package:
python-psycopg2-2.7.5-1.rhel7.1.x86_64
--> Running transaction check
---> Package postgresql11-libs.x86_64 0:11.2-2PGDG.rhel7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================================================================================
Package Arch
Version Repository
Size
======================================================================================================================================================================
Updating:
python-psycopg2 x86_64
2.7.5-1.rhel7.1 pgdg11
155 k
Installing for dependencies:
postgresql11-libs x86_64
11.2-2PGDG.rhel7 pgdg11
360 k

Transaction Summary
======================================================================================================================================================================
Install ( 1 Dependent package)
Upgrade 1 Package

Total download size: 515 k
Is this ok [y/d/N]: y
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
(1/2): postgresql11-libs-11.2-2PGDG.rhel7.x86_64.rpm
| 360
kB 00:00:00
(2/2): python-psycopg2-2.7.5-1.rhel7.1.x86_64.rpm
| 155 kB
00:00:00
----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total
629 kB/s | 515 kB
00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : postgresql11-libs-11.2-2PGDG.rhel7.x86_64

1/3
Updating : python-psycopg2-2.7.5-1.rhel7.1.x86_64

2/3
Cleanup : python-psycopg2-2.7.5-1.rhel7.x86_64

3/3
Verifying : python-psycopg2-2.7.5-1.rhel7.1.x86_64

1/3
Verifying : postgresql11-libs-11.2-2PGDG.rhel7.x86_64

2/3
Verifying : python-psycopg2-2.7.5-1.rhel7.x86_64

3/3

Dependency Installed:
postgresql11-libs.x86_64 0:11.2-2PGDG.rhel7

Updated:
python-psycopg2.x86_64 0:2.7.5-1.rhel7.1

Complete!