diff --git a/REFERENCE.md b/REFERENCE.md
index 6330d4d..12bd9f2 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -143,16 +143,20 @@ The following parameters are available in the `patroni` class:
 * [`service_ensure`](#-patroni--service_ensure)
 * [`service_enable`](#-patroni--service_enable)
 * [`custom_pip_provider`](#-patroni--custom_pip_provider)
+* [`is_standby`](#-patroni--is_standby)
+* [`standby_cluster_host`](#-patroni--standby_cluster_host)
+* [`standby_cluster_port`](#-patroni--standby_cluster_port)
+* [`standby_cluster_primary_slot_name`](#-patroni--standby_cluster_primary_slot_name)
 
 ##### <a name="-patroni--scope"></a>`scope`
 
-Data type: `String`
+Data type: `String[1]`
 
 Refer to Patroni Global `scope` setting
 
 ##### <a name="-patroni--namespace"></a>`namespace`
 
-Data type: `String`
+Data type: `String[1]`
 
 Refer to Patroni Global `namespace` setting
 
@@ -927,7 +931,7 @@ Default value: `false`
 
 ##### <a name="-patroni--zookeeper_hosts"></a>`zookeeper_hosts`
 
-Data type: `Array[String]`
+Data type: `Array[String[1]]`
 
 Refer to Zookeeper configuration `hosts` setting
 
@@ -943,7 +947,7 @@ Default value: `'automatic'`
 
 ##### <a name="-patroni--watchdog_device"></a>`watchdog_device`
 
-Data type: `String`
+Data type: `Stdlib::Absolutepath`
 
 Refer to Watchdog configuration `device` setting
 
@@ -967,7 +971,7 @@ Default value: `true`
 
 ##### <a name="-patroni--postgresql_version"></a>`postgresql_version`
 
-Data type: `Optional[String]`
+Data type: `Optional[String[1]]`
 
 Version of postgresql passed to postgresql::globals class
 
@@ -975,7 +979,7 @@ Default value: `undef`
 
 ##### <a name="-patroni--package_name"></a>`package_name`
 
-Data type: `String`
+Data type: `String[1]`
 
 Patroni package name, only used when `install_method` is `package`
 
@@ -983,7 +987,7 @@ Default value: `'patroni'`
 
 ##### <a name="-patroni--version"></a>`version`
 
-Data type: `String`
+Data type: `String[1]`
 
 Version of Patroni to install
 
@@ -991,7 +995,7 @@ Default value: `'present'`
 
 ##### <a name="-patroni--install_dependencies"></a>`install_dependencies`
 
-Data type: `Array`
+Data type: `Array[String[1]]`
 
 Install dependencies, only used when `install_method` is `pip`
 
@@ -1023,7 +1027,7 @@ Default value: `'/opt/app/patroni'`
 
 ##### <a name="-patroni--python_class_version"></a>`python_class_version`
 
-Data type: `String`
+Data type: `String[1]`
 
 The  version of Python to pass to Python class
 Only used when `install_method` is `pip`
@@ -1032,7 +1036,7 @@ Default value: `'36'`
 
 ##### <a name="-patroni--python_venv_version"></a>`python_venv_version`
 
-Data type: `String`
+Data type: `String[1]`
 
 The  version of Python to pass to Python virtualenv defined type
 Only used when `install_method` is `pip`
@@ -1049,7 +1053,7 @@ Default value: `true`
 
 ##### <a name="-patroni--config_path"></a>`config_path`
 
-Data type: `String`
+Data type: `Stdlib::Absolutepath`
 
 Path to Patroni configuration file
 
@@ -1057,7 +1061,7 @@ Default value: `'/opt/app/patroni/etc/postgresql.yml'`
 
 ##### <a name="-patroni--config_owner"></a>`config_owner`
 
-Data type: `String`
+Data type: `String[1]`
 
 Patroni configuration file owner
 
@@ -1065,7 +1069,7 @@ Default value: `'postgres'`
 
 ##### <a name="-patroni--config_group"></a>`config_group`
 
-Data type: `String`
+Data type: `String[1]`
 
 Patroni configuration file group
 
@@ -1073,7 +1077,7 @@ Default value: `'postgres'`
 
 ##### <a name="-patroni--config_mode"></a>`config_mode`
 
-Data type: `String`
+Data type: `Stdlib::Filemode`
 
 Patroni configuration file mode
 
@@ -1081,7 +1085,7 @@ Default value: `'0600'`
 
 ##### <a name="-patroni--service_name"></a>`service_name`
 
-Data type: `String`
+Data type: `String[1]`
 
 Name of Patroni service
 
@@ -1089,7 +1093,7 @@ Default value: `'patroni'`
 
 ##### <a name="-patroni--service_ensure"></a>`service_ensure`
 
-Data type: `String`
+Data type: `Enum['running', 'stopped']`
 
 Patroni service ensure property
 
@@ -1111,6 +1115,38 @@ Use custom pip path when installing pip packages
 
 Default value: `undef`
 
+##### <a name="-patroni--is_standby"></a>`is_standby`
+
+Data type: `Boolean`
+
+Boolean to use Standby cluster
+
+Default value: `false`
+
+##### <a name="-patroni--standby_cluster_host"></a>`standby_cluster_host`
+
+Data type: `String`
+
+Refer to Standby configuration `host` setting
+
+Default value: `'127.0.0.1'`
+
+##### <a name="-patroni--standby_cluster_port"></a>`standby_cluster_port`
+
+Data type: `Stdlib::Port`
+
+Refer to Standby configuration `port` setting
+
+Default value: `5432`
+
+##### <a name="-patroni--standby_cluster_primary_slot_name"></a>`standby_cluster_primary_slot_name`
+
+Data type: `String[1]`
+
+Refer to Standby configuration `slot` setting
+
+Default value: `'patroni'`
+
 ## Resource types
 
 ### <a name="patroni_dcs_config"></a>`patroni_dcs_config`
diff --git a/manifests/init.pp b/manifests/init.pp
index 9e09ac8..c6a0194 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -253,8 +253,8 @@
 class patroni (
 
   # Global Settings
-  String $scope,
-  String $namespace = '/service/',
+  String[1] $scope,
+  String[1] $namespace = '/service/',
   String $hostname = $facts['networking']['hostname'],
 
   # Bootstrap Settings
@@ -283,7 +283,7 @@
   Boolean $is_standby = false,
   String $standby_cluster_host = '127.0.0.1',
   Stdlib::Port $standby_cluster_port = 5432,
-  Optional[String] $standby_cluster_primary_slot_name = 'patroni',
+  String[1] $standby_cluster_primary_slot_name = 'patroni',
 
   # PostgreSQL Settings
   String $superuser_username = 'postgres',
@@ -373,31 +373,31 @@
 
   # ZooKeeper Settings
   Boolean $use_zookeeper = false,
-  Array[String] $zookeeper_hosts = [],
+  Array[String[1]] $zookeeper_hosts = [],
 
   # Watchdog Settings
   Enum['off','automatic','required'] $watchdog_mode = 'automatic',
-  String $watchdog_device = '/dev/watchdog',
+  Stdlib::Absolutepath $watchdog_device = '/dev/watchdog',
   Integer $watchdog_safety_margin = 5,
 
   # Module Specific Settings
   Boolean $manage_postgresql = true,
-  Optional[String] $postgresql_version = undef,
-  String $package_name = 'patroni',
-  String $version = 'present',
-  Array $install_dependencies = [],
+  Optional[String[1]] $postgresql_version = undef,
+  String[1] $package_name = 'patroni',
+  String[1] $version = 'present',
+  Array[String[1]] $install_dependencies = [],
   Boolean $manage_python = true,
   Enum['package','pip'] $install_method = 'pip',
   Stdlib::Absolutepath $install_dir = '/opt/app/patroni',
-  String $python_class_version = '36',
-  String $python_venv_version = '3.6',
+  String[1] $python_class_version = '36',
+  String[1] $python_venv_version = '3.6',
   Boolean $manage_venv_package = true,
-  String $config_path = '/opt/app/patroni/etc/postgresql.yml',
-  String $config_owner = 'postgres',
-  String $config_group = 'postgres',
-  String $config_mode = '0600',
-  String $service_name = 'patroni',
-  String $service_ensure = 'running',
+  Stdlib::Absolutepath $config_path = '/opt/app/patroni/etc/postgresql.yml',
+  String[1] $config_owner = 'postgres',
+  String[1] $config_group = 'postgres',
+  Stdlib::Filemode $config_mode = '0600',
+  String[1] $service_name = 'patroni',
+  Enum['running', 'stopped'] $service_ensure = 'running',
   Boolean $service_enable = true,
   Optional[String[1]] $custom_pip_provider = undef,
 ) {