You can use these: * Upgrading notes: https://www.varnish-cache.org/docs/4.0/whats-new/upgrading.html https://www.varnish-cache.org/docs/4.0/whats-new/upgradin

You can use these: * Upgrading notes: https://www.varnish-cache.org/docs/4.0/whats-new/upgrading.html https://www.varnish-cache.org/docs/4.0/whats-new/upgrading.h... * A script by Fed that will do 70-90% of the job for you: https://github.com/fgsch/varnish3to4 https://github.com/fgsch/varnish3to4 Let us know how it went :-)