Failed Dependencies Upgrading PMS to1.4.2.3400 on CentOS 7.3.1611

Hello,

Hope someone can point me in the right direction. I receive the following when trying to upgrade from PMS 1.3.4.3285 to 1.4.2.3400 on CentOS 7.3.1611:

rpm -Uv plexmediaserver-1.4.2.3400-ab906953b.x86_64.rpm

warning: plexmediaserver-1.4.2.3400-ab906953b.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 3adca79d: NOKEY
error: Failed dependencies:
        libtag.so.1()(64bit) is needed by plexmediaserver-1.4.2.3400-ab906953b.x86_64

Any help is appreciated.

Thanks!
Ray