Debian-10 based build - https://buildbot.mariadb.org/#/builders/123/builds/104/steps/4/logs/stdio now rejects < 2048 bit keys (assumed) I attempted a 4096 bit key - https://github.com/grooverdan/node-mysql/commit/d04ce8054f62d6ec5bb51ba75ba59ae1f1220516 however this still got errors "Error: unable to verify the first certificate" https://travis-ci.org/github/grooverdan/node-mysql/jobs/753886588