diff --git a/controls/mysql_conf.rb b/controls/mysql_conf.rb
index b679d9a..a543499 100644
--- a/controls/mysql_conf.rb
+++ b/controls/mysql_conf.rb
@@ -1,8 +1,7 @@
-# encoding: utf-8
 # frozen_string_literal: true
 
-# Copyright 2014, Deutsche Telekom AG
-# Copyright 2018, Christoph Hartmann
+# Copyright:: 2014, Deutsche Telekom AG
+# Copyright:: 2018, Christoph Hartmann
 #
 # 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/controls/mysql_db.rb b/controls/mysql_db.rb
index 8064ef2..dfbbcfc 100644
--- a/controls/mysql_db.rb
+++ b/controls/mysql_db.rb
@@ -1,8 +1,7 @@
-# encoding: utf-8
 # frozen_string_literal: true
 
-# Copyright 2014, Deutsche Telekom AG
-# Copyright 2018, Christoph Hartmann
+# Copyright:: 2014, Deutsche Telekom AG
+# Copyright:: 2018, Christoph Hartmann
 #
 # 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/libraries/mysql_distribution.rb b/libraries/mysql_distribution.rb
index 2de971f..2201a79 100644
--- a/libraries/mysql_distribution.rb
+++ b/libraries/mysql_distribution.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright 2020, Sebastian Gumprich
+# Copyright:: 2020, Sebastian Gumprich
 #
 # 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/libraries/mysql_version.rb b/libraries/mysql_version.rb
index 086d81c..2801ea6 100644
--- a/libraries/mysql_version.rb
+++ b/libraries/mysql_version.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright 2020, Sebastian Gumprich
+# Copyright:: 2020, Sebastian Gumprich
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.