Package postgresql-jdbc-42.3.6-1.rhel7.noarch.rpm is not signed

I'm not able to install latest JDBC release

on CentOS 7 from pgdg-common yum rpm repository.

Would you please check that the release RPM is signed?

Here is how install attempt looks like:

# yum install postgresql-jdbc

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.mirror.far.fi
 * epel: epel.mirror.far.fi
 * extras: centos.mirror.far.fi
 * updates: centos.mirror.far.fi
Resolving Dependencies
--> Running transaction check
---> Package postgresql-jdbc.noarch 0:42.3.6-1.rhel7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

===================================================================================================================================================================================================================
 Package                                               Arch                                         Version                                                Repository                                         Size
===================================================================================================================================================================================================================
Installing:
 postgresql-jdbc                                       noarch                                       42.3.6-1.rhel7                                         pgdg-common                                       921 k

Transaction Summary
===================================================================================================================================================================================================================
Install  1 Package

Total size: 921 k
Installed size: 991 k
Is this ok [y/d/N]: y
Downloading packages:


Package postgresql-jdbc-42.3.6-1.rhel7.noarch.rpm is not signed
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