diff --git a/Vagrantfile b/Vagrantfile
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -505,7 +505,7 @@
     config.vm.box                     = $global_debian10_box
     config.vm.box_url                 = $global_debian10_box_url
     config.vm.box_check_update        = false
-    config.vm.hostname                = "pergamon.internal.softwareheritage.org"
+    config.vm.hostname                = "pergamon.softwareheritage.org"
     config.vm.network   :private_network, ip: "10.168.100.29", netmask: "255.255.0.0"
 
     config.vm.synced_folder "/tmp/puppet/", "/tmp/puppet", type: 'nfs'