diff --git a/Vagrantfile b/Vagrantfile
index 5194289b7ee5ee4536b8cac842551532ee667763..22eac99d24ba66e1075ae4281a31892f232ee9c5 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -6,7 +6,7 @@
 # backwards compatibility). Please don't change it unless you know what
 # you're doing.
 Vagrant.configure("2") do |config|
-  config.vm.box = "debian/contrib-stretch64"
+  config.vm.box = "debian/bullseye64"
   config.vm.hostname = "gimmecert-testing"
 
   config.vm.provision "shell", path: "provision.sh"