diff --git a/staging.rb b/staging.rb
index 0b48a29..6541c2b 100644
--- a/staging.rb
+++ b/staging.rb
@@ -219,14 +219,14 @@ def self.write_inventory(pve_ip:, storage_pool:, extra_hosts:, host_common_hash:
               "last": 'foo',
               "email": 'foo@example.com',
               "publickey": ssh_keys,
-              "group": ''
+              "groups": ['']
             },
             "bar": {
               "first": 'bar',
               "last": 'bar',
               "email": 'bar@example.com',
               "publickey": ssh_keys,
-              "group": 'sudo'
+              "groups": ['sudo']
             }
           }
         )