network radius packages for centos 7

Hello, I'm trying to install freeradius RPM's for centos 7.5. I've added key and repos according to https://networkradius.com/freeradius-packages/index.html, but unfortunately I'm getting /Package freeradius-3.0.17-2.el7.centos.x86_64.rpm is not signed /(and for all other packages from the repo) when installing with yum. Did anyone hit same issue? Also, as a sidenote, starting from RHEL/centos 7.5 default openldap package is built with openssl libraries, so I think that there will no longer be need for "hard" dependencies for openldap-ltb from rhel/centos 7.5 and up. Regards, Kacper