diff --git a/README.md b/README.md
index bf44849..abe68a0 100644
--- a/README.md
+++ b/README.md
@@ -127,7 +127,7 @@ class { '::graylog::repository':
 }->
 class { '::graylog::server':
   config  => {
-    is_master                                          => true,
+    is_leader                                          => true,
     node_id_file                                       => '/etc/graylog/server/node-id',
     password_secret                                    => 'password_secret',
     root_username                                      => 'admin',
@@ -238,7 +238,7 @@ Example:
 config => {
   'password_secret'    => '...',
   'root_password_sha2' => '...',
-  'is_master'          => true,
+  'is_leader'          => true,
   'output_batch_size'  => 2500,
 }
 ```
diff --git a/manifests/params.pp b/manifests/params.pp
index 96a4540..52526dd 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -9,7 +9,7 @@
     'data_dir'            => '/var/lib/graylog-server',
     'plugin_dir'          => '/usr/share/graylog-server/plugin',
     'message_journal_dir' => '/var/lib/graylog-server/journal',
-    'is_master'           => true,
+    'is_leader'           => true,
   }
 
   $server_user = 'graylog'