SHA-1 FIPS - compliance

Hi all,
I am a new maintainer of PostgreSQL in Fedora and RHEL. Currently, I am
solving usage SHA-1  for key-derivation in pgcrypto (the s2k-digest-algo).
In the documentation <https://www.postgresql.org/docs/8.3/pgcrypto.html>, I
have found that there are options SHA-1 or MD5. Unfortunately, none of
these algorithms are FIPS compliant. So I would like to ask if exists a
possibility to add or enable support for some type of stronger hash
algorithm?

Thanks
    -Filip-