diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3ddc78f9f..cdc466426 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## master (unreleased)
 
+## 1.5.0 (2021-05-02)
+
 ### New features
 
 * [#182](https://github.com/rubocop-hq/rubocop-ast/pull/182): Support `Parser::Ruby31` for Ruby 3.1 parser (experimental). ([@koic][])
diff --git a/docs/antora.yml b/docs/antora.yml
index dd0540dea..863ca9ecc 100644
--- a/docs/antora.yml
+++ b/docs/antora.yml
@@ -1,5 +1,5 @@
 name: rubocop-ast
 title: RuboCop AST
-version: master
+version: '1.5'
 nav:
 - modules/ROOT/nav.adoc
diff --git a/lib/rubocop/ast/version.rb b/lib/rubocop/ast/version.rb
index 265caf49e..306330b3a 100644
--- a/lib/rubocop/ast/version.rb
+++ b/lib/rubocop/ast/version.rb
@@ -3,7 +3,7 @@
 module RuboCop
   module AST
     module Version
-      STRING = '1.4.2'
+      STRING = '1.5.0'
     end
   end
 end