diff --git a/manifests/init.pp b/manifests/init.pp
index 6de3058b..543d8579 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -278,8 +278,8 @@
   Boolean $manage_user                                              = true,
   String $user                                                      = 'jira',
   String $group                                                     = 'jira',
-  String $installdir_owner                                          = 'root',
-  String $installdir_group                                          = 'root',
+  String[1] $installdir_owner                                       = 'root',
+  String[1] $installdir_group                                       = 'root',
   Stdlib::Filemode $installdir_mode                                 = '0755',
   Optional[Stdlib::Filemode] $homedir_mode                          = undef,
   Optional[Integer[0]] $uid                                         = undef,
@@ -305,7 +305,7 @@
   Optional[String] $dburl                                           = undef,
   Optional[String] $connection_settings                             = undef,
   Boolean $oracle_use_sid                                           = true,
-  Optional[String] $dbschema                                        = undef,
+  Optional[String[1]] $dbschema                                     = undef,
   # MySQL Connector Settings
   Boolean $mysql_connector_manage                                   = true,
   String $mysql_connector_version                                   = '8.0.23',