Could't download the data

[denka0711]

~/deep-eos/data ~/deep-eos
Downloading corpus for de.sentences.tar.xz
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 185 100 185 0 0 293 0 --:--:-- --:--:-- --:--:-- 293
0 0 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0
curl: (60) SSL certificate problem: certificate has expired
More details here: https://curl.haxx.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 web page mentioned above.