While others suggested adding the DNS records manually the far more secure and easier in the long term solution is to run pihole with unbound. Going this route completely eliminates third party upstream DNS servers as unbound will query the top level domain for their authoritative name server and direct the IP address from the source. Pihole has a great explanation on their website. I like crosstalk solutions on setting it up as it's has everything you need just to copy paste your way into it working.