problems installing postgresql 7.4.2-1

Hi all,

I am trying to upgrade from version 7.1.3-2 to 7.4.2-1.
I have uninstalled the previous version. I am using RedHat Linux 8.0

when i run the command

$rpm -ivh postgresql-libs-7.4.2-1.i386.rpm
warining: postgresql-libs-7.4.2-1.i386.rmp: V3 DSA signature: NOKEY, key ID
30c9ecf8
error: Failed dependencies:
    libcrypto.so.4 is needed by postgresql-libs-7.4.2-1
    libssl.so.4 is needed by postgresql-devel-7.4.2-1

I am getting the above error. Can anyone please tell me what could be the
problem.

Thanks in advance.

> With Best Regards
> Pradeep Kumar P J
>
>
>