diff --git a/CHANGELOG.md b/CHANGELOG.md
index c5e2884..ce154ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## master (unreleased)
 
+## 1.0.0 (2020-12-24)
+
 - Drop Ruby 2.4 support and require RuboCop 1.0.
 
 ## 0.4.1 (2020-11-05)
diff --git a/LICENSE.txt b/LICENSE.txt
index 2bf391f..129590c 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2017-2019 Vladimir Dementyev
+Copyright (c) 2017-2021 Vladimir Dementyev
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/lib/rubocop/markdown/version.rb b/lib/rubocop/markdown/version.rb
index fa324ff..efb4ac1 100644
--- a/lib/rubocop/markdown/version.rb
+++ b/lib/rubocop/markdown/version.rb
@@ -2,6 +2,6 @@
 
 module RuboCop
   module Markdown
-    VERSION = "0.4.1"
+    VERSION = "1.0.0"
   end
 end