Curl: (60) SSL certificate problem

[aslesarev]

I've tried to execute plannotate setupdb and uncounted the following error:

(plannotate) as@k27:/pLannotate> plannotate setupdb
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
curl: (60) SSL certificate problem: self-signed certificate in certificate chain
More details here: https://curl.se/docs/sslcerts.html

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the webpage mentioned above.
Error downloading databases. Please try again or contact the developer.

How do I fix this? Is there a list of database servers that plannotate is trying to connect? Or may be there is an alternative way to download databases?