diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..389f270
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,4 @@
+Chef/Modernize/FoodcriticComments:
+  Enabled: true
+Chef/Style/CopyrightCommentFormat:
+  Enabled: true
diff --git a/README.rst b/README.rst
index 6bfcfed..c3c3595 100644
--- a/README.rst
+++ b/README.rst
@@ -18,8 +18,8 @@ and will soon other queues.
 Requirements
 ============
 
-- Chef 15 or higher
-- Chef Workstation 21.2.303 for testing (also includes berkshelf for
+- Chef 16 or higher
+- Chef Workstation 21.10.640 for testing (also includes berkshelf for
   cookbook dependency resolution)
 
 Platforms
@@ -35,7 +35,7 @@ Cookbooks
 The following cookbooks are dependencies:
 
 - 'openstack-common', '>= 20.0.0'
-- 'rabbitmq', '~> 5.8'
+- 'rabbitmq', '=> 5.8.5'
 
 Usage
 =====
@@ -137,7 +137,7 @@ License and Author
 +-----------------+--------------------------------------------------+
 | **Copyright**   | Copyright (c) 2013-2014, IBM Corp.               |
 +-----------------+--------------------------------------------------+
-| **Copyright**   | Copyright (c) 2019-2020, Oregon State University |
+| **Copyright**   | Copyright (c) 2019-2021, Oregon State University |
 +-----------------+--------------------------------------------------+
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may
diff --git a/attributes/default.rb b/attributes/default.rb
index ac14602..c851e21 100644
--- a/attributes/default.rb
+++ b/attributes/default.rb
@@ -2,9 +2,9 @@
 # Cookbook:: openstack-ops-messaging
 # Recipe:: default
 #
-# Copyright:: 2013, AT&T Services, Inc.
-# Copyright:: 2013, Opscode, Inc.
-# Copyright:: 2019, Oregon State University
+# Copyright:: 2013-2021, AT&T Services, Inc.
+# Copyright:: 2013-2021, Chef Software, Inc.
+# Copyright:: 2019-2021, Oregon State University
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/metadata.rb b/metadata.rb
index f78560e..bd937dc 100644
--- a/metadata.rb
+++ b/metadata.rb
@@ -14,4 +14,4 @@ depends 'rabbitmq', '>= 5.8.5'
 
 issues_url 'https://launchpad.net/openstack-chef'
 source_url 'https://opendev.org/openstack/cookbook-openstack-ops-messaging'
-chef_version '>= 15.0'
+chef_version '>= 16.0'
diff --git a/recipes/rabbitmq-server.rb b/recipes/rabbitmq-server.rb
index 25547f1..1fbe785 100644
--- a/recipes/rabbitmq-server.rb
+++ b/recipes/rabbitmq-server.rb
@@ -2,9 +2,9 @@
 # Cookbook:: openstack-ops-messaging
 # Recipe:: rabbitmq-server
 #
-# Copyright:: 2013, Opscode, Inc.
-# Copyright:: 2013, AT&T Services, Inc.
-# Copyright:: 2013, Craig Tracey <craigtracey@gmail.com>
+# Copyright:: 2013-2021, Chef Software, Inc.
+# Copyright:: 2013-2021, AT&T Services, Inc.
+# Copyright:: 2013-2021, Craig Tracey <craigtracey@gmail.com>
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');
 # you may not use this file except in compliance with the License.