Good point. Here are the expiration dates for the 21 certs: Not After : Jan 14 16:29:17 2007 GMT Not After : Aug 13 23:59:00 2018 GMT Not After : Aug 22

Good point. Here are the expiration dates for the 21 certs: Not After : Jan 14 16:29:17 2007 GMT Not After : Aug 13 23:59:00 2018 GMT Not After : Aug 22 16:41:51 2018 GMT Not After : Dec 9 19:47:26 2018 GMT Not After : Dec 10 18:40:23 2018 GMT Not After : Feb 20 14:08:11 2019 GMT Not After : Feb 20 14:10:22 2019 GMT Not After : May 25 16:39:40 2019 GMT Not After : Jun 23 12:14:45 2019 GMT Not After : Jun 25 22:23:48 2019 GMT Not After : Jun 26 00:19:54 2019 GMT Not After : Jun 26 00:22:33 2019 GMT Not After : Jun 21 04:00:00 2020 GMT Not After : Jun 21 04:00:00 2020 GMT Not After : Dec 31 23:59:59 2020 GMT Not After : Dec 31 23:59:59 2020 GMT Not After : Aug 1 23:59:59 2028 GMT Not After : Aug 1 23:59:59 2028 GMT Not After : Aug 1 23:59:59 2028 GMT Not After : Aug 2 23:59:59 2028 GMT Not After : Aug 2 23:59:59 2028 GMT It's somewhat surprising that one of the certificates has already expired, but is still in ca-certificates.