http://www.trusted-design.net/archives/933/
ちょい改変

$ openssl version

$ sudo wget https://www.openssl.org/source/openssl-1.1.1f.tar.gz
$ sudo tar -zxf openssl-1.1.1f.tar.gz
$ cd openssl-1.1.1f
$ sudo ./config
$ sudo make
$ sudo make install

$ sudo mv /usr/bin/openssl ~/backup/
$ sudo ln -s /usr/local/bin/openssl /usr/bin/openssl