diff --git a/Vagrantfile b/Vagrantfile
index 467fb95e..b1c847d8 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -2,7 +2,7 @@
 # vi: set ft=ruby :
 
 Vagrant.configure("2") do |config|
-  config.vm.box = "ubuntu/bionic64"
+  config.vm.box = "ubuntu/focal64"
 
   # Network config: Since it's a mail server, the machine must be connected
   # to the public web. However, we currently don't want to expose SSH since