diff --git a/packer.json b/packer.json
index 2573164..dd186eb 100644
--- a/packer.json
+++ b/packer.json
@@ -21,7 +21,8 @@
     },
     {
       "type": "ansible",
-      "playbook_file": "ansible/playbook.yml"
+      "playbook_file": "ansible/playbook.yml",
+      "extra_arguments": [ "--extra-vars", "\"mastodon_db_password=CHANGEME mastodon_db_login_unix_socket=/var/run/postgresql\"" ]
     },
     { "type": "shell",
       "execute_command": "{{ .Vars }} sudo -E -S sh '{{ .Path }}'",