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Heroku-16 and Heroku-18 Stack Images Updated
Change effective on 09 December 2019
We have updated the heroku-16
and heroku-18
stack images to pick up
security fixes in upstream packages. The new stack images will be rolled out automatically
in the next 24 hours. You do not need to redeploy your app or manually restart your dynos.
See this Dev Center article for an overview of the packages available in each stack image.