As Devrim blogged about Postgres YUM repo changes , I wanted to write down procedure I have to follow this morning
If you want to update YUM repo for Postgres 9.4 on CentOS x86_64, you can update executing below command:
yum localinstall https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-6-x86_64/pgdg-centos94-9.4-3.noarch.rpm
Now, you can follow normal Postgres version upgrade procedure.
Hope this will help someone