Speakup While Booting?

[Chime Hart]

Last week or so, I may have asked here about boot messages while speakup-and-the 
DecTalk are coming up. Well in an interactive boot, reading from the journal 
log, here are 4lines dealing with Speakup
Jun 06 15:18:23 chime kernel: speakup: module is from the staging directory, the 
quality is unknown, you have been warned.
Jun 06 15:18:23 chime kernel: speakup: module verification failed: signature 
and/or required key missing - tainting kernel
Jun 06 15:18:23 chime kernel: input: Speakup as /devices/virtual/input/input3
Jun 06 15:18:23 chime kernel: initialized device: /dev/synth, node (MAJOR 10, 
MINOR 25)
Jun 06 15:18:23 chime kernel: speakup 
Back again live, in earlier mesages there were mentions of a new patch, I have a 
Linux expert here now, how do we either update or install the latest patches? In 
Justin's log, you mention a kernel4.17  well, I just ran a dist-upgrade here in 
Debian Buster Sid, still around 4.16.2. Thanks so much in advance
Chime