diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4dd5de1b5..fbd08e1374 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 *See the full release notes on the official documentation website: https://www.elastic.co/guide/en/elasticsearch/client/ruby-api/current/release_notes.html*
 
+## 8.19.1 Release notes
+
+#### API changes
+
+* Updated source code documentation links to Elasticsearch documentation to 8.19
+* Adds `transform.set_upgrade_mode` - Sets a cluster wide upgrade_mode setting that prepares transform indices for an upgrade.
+
 ## 8.19.0 Release notes
 
 #### Client
diff --git a/docs/release_notes/819.asciidoc b/docs/release_notes/819.asciidoc
index b8c70529f6..67253468f0 100644
--- a/docs/release_notes/819.asciidoc
+++ b/docs/release_notes/819.asciidoc
@@ -1,6 +1,15 @@
 [[release_notes_8_19]]
 === 8.19 Release notes
 
+[discrete]
+[[release_notes_8_19_1]]
+=== 8.19.1 Release notes
+
+[discrete]
+==== API
+* Updated source code documentation links to Elasticsearch documentation to 8.19
+* Adds `transform.set_upgrade_mode` - Sets a cluster wide upgrade_mode setting that prepares transform indices for an upgrade.
+
 [discrete]
 [[release_notes_8_19_0]]
 === 8.19.0 Release notes
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/transform/set_upgrade_mode.rb b/elasticsearch-api/lib/elasticsearch/api/actions/transform/set_upgrade_mode.rb
new file mode 100644
index 0000000000..e29a0af981
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/transform/set_upgrade_mode.rb
@@ -0,0 +1,52 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Auto generated from build hash f284cc16f4d4b4289bc679aa1529bb504190fe80
+# @see https://github.com/elastic/elasticsearch/tree/main/rest-api-spec
+#
+module Elasticsearch
+  module API
+    module Transform
+      module Actions
+        # Sets a cluster wide upgrade_mode setting that prepares transform indices for an upgrade.
+        #
+        # @option arguments [Boolean] :enabled Whether to enable upgrade_mode Transform setting or not. Defaults to false.
+        # @option arguments [Time] :timeout Controls the time to wait before action times out. Defaults to 30 seconds
+        # @option arguments [Hash] :headers Custom HTTP headers
+        #
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.19/transform-set-upgrade-mode.html
+        #
+        def set_upgrade_mode(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'transform.set_upgrade_mode' }
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body   = nil
+
+          method = Elasticsearch::API::HTTP_POST
+          path   = '_transform/set_upgrade_mode'
+          params = Utils.process_params(arguments)
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/version.rb b/elasticsearch-api/lib/elasticsearch/api/version.rb
index f3e663412c..0036171c9b 100644
--- a/elasticsearch-api/lib/elasticsearch/api/version.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/version.rb
@@ -17,6 +17,6 @@
 
 module Elasticsearch
   module API
-    VERSION = '8.19.0'.freeze
+    VERSION = '8.19.1'.freeze
   end
 end
diff --git a/elasticsearch-api/spec/elasticsearch/api/actions/transform/set_upgrade_mode_spec.rb b/elasticsearch-api/spec/elasticsearch/api/actions/transform/set_upgrade_mode_spec.rb
new file mode 100644
index 0000000000..9dd1b158c1
--- /dev/null
+++ b/elasticsearch-api/spec/elasticsearch/api/actions/transform/set_upgrade_mode_spec.rb
@@ -0,0 +1,35 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client.transform#set_upgrade_mode' do
+  let(:expected_args) do
+    [
+      'POST',
+      '_transform/set_upgrade_mode',
+      {},
+      nil,
+      {},
+      { endpoint: 'transform.set_upgrade_mode' }
+    ]
+  end
+
+  it 'performs the request' do
+    expect(client_double.transform.set_upgrade_mode).to be_a Elasticsearch::API::Response
+  end
+end
diff --git a/elasticsearch/elasticsearch.gemspec b/elasticsearch/elasticsearch.gemspec
index 0c434a729f..e296226f6e 100644
--- a/elasticsearch/elasticsearch.gemspec
+++ b/elasticsearch/elasticsearch.gemspec
@@ -46,7 +46,7 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 2.5'
 
   s.add_dependency 'elastic-transport', '~> 8.3'
-  s.add_dependency 'elasticsearch-api', '8.19.0'
+  s.add_dependency 'elasticsearch-api', '8.19.1'
 
   s.add_development_dependency 'base64'
   s.add_development_dependency 'bundler'
diff --git a/elasticsearch/lib/elasticsearch/version.rb b/elasticsearch/lib/elasticsearch/version.rb
index 4826df9a6d..a18d6bb476 100644
--- a/elasticsearch/lib/elasticsearch/version.rb
+++ b/elasticsearch/lib/elasticsearch/version.rb
@@ -16,5 +16,5 @@
 # under the License.
 
 module Elasticsearch
-  VERSION = '8.19.0'.freeze
+  VERSION = '8.19.1'.freeze
 end