diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07d38f1bea..a7dcdb6827 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@
 
 ## master (unreleased)
 
+## 1.20.0 (2023-12-16)
+
 ### New features
 
 * [#384](https://github.com/rubocop/rubocop-performance/issues/384): Support optimized `String#dup` for `Performance/UnfreezeString` when Ruby 3.3+. ([@koic][])
diff --git a/docs/antora.yml b/docs/antora.yml
index 21b1815a34..186bc944d1 100644
--- a/docs/antora.yml
+++ b/docs/antora.yml
@@ -2,6 +2,6 @@ name: rubocop-performance
 title: RuboCop Performance
 # We always provide version without patch here (e.g. 1.1),
 # as patch versions should not appear in the docs.
-version: ~
+version: '1.20'
 nav:
   - modules/ROOT/nav.adoc
diff --git a/docs/modules/ROOT/pages/cops_performance.adoc b/docs/modules/ROOT/pages/cops_performance.adoc
index 29dd534556..d25ab7891e 100644
--- a/docs/modules/ROOT/pages/cops_performance.adoc
+++ b/docs/modules/ROOT/pages/cops_performance.adoc
@@ -544,8 +544,7 @@ passed to the `count` call.
 === Safety
 
 This cop is unsafe because it has known compatibility issues with `ActiveRecord` and other
-frameworks. ActiveRecord's `count` ignores the block that is passed to it.
-`ActiveRecord` will ignore the block that is passed to `count`.
+frameworks. Before Rails 5.1, `ActiveRecord` will ignore the block that is passed to `count`.
 Other methods, such as `select`, will convert the association to an
 array and then run the block on the array. A simple work around to
 make `count` work with a block is to call `to_a.count {...}`.
@@ -2075,11 +2074,13 @@ and the following examples are parts of it.
 send('do_something')
 attr_accessor 'do_something'
 instance_variable_get('@ivar')
+const_get("string_#{interpolation}")
 
 # good
 send(:do_something)
 attr_accessor :do_something
 instance_variable_get(:@ivar)
+const_get(:"string_#{interpolation}")
 ----
 
 == Performance/StringInclude
@@ -2111,6 +2112,7 @@ str =~ /ab/
 /ab/ =~ str
 str.match(/ab/)
 /ab/.match(str)
+/ab/ === str
 
 # good
 str.include?('ab')
@@ -2328,8 +2330,8 @@ if you expect `ASCII-8BIT` encoding, disable this cop.
 [source,ruby]
 ----
 # bad
-''.dup
-"something".dup
+''.dup          # when Ruby 3.2 or lower
+"something".dup # when Ruby 3.2 or lower
 String.new
 String.new('')
 String.new('something')
diff --git a/lib/rubocop/performance/version.rb b/lib/rubocop/performance/version.rb
index 52ddb9e887..567e69737a 100644
--- a/lib/rubocop/performance/version.rb
+++ b/lib/rubocop/performance/version.rb
@@ -4,7 +4,7 @@ module RuboCop
   module Performance
     # This module holds the RuboCop Performance version information.
     module Version
-      STRING = '1.19.1'
+      STRING = '1.20.0'
 
       def self.document_version
         STRING.match('\d+\.\d+').to_s
diff --git a/relnotes/v1.20.0.md b/relnotes/v1.20.0.md
new file mode 100644
index 0000000000..92530dc39b
--- /dev/null
+++ b/relnotes/v1.20.0.md
@@ -0,0 +1,22 @@
+### New features
+
+* [#384](https://github.com/rubocop/rubocop-performance/issues/384): Support optimized `String#dup` for `Performance/UnfreezeString` when Ruby 3.3+. ([@koic][])
+
+### Bug fixes
+
+* [#374](https://github.com/rubocop/rubocop-performance/issues/374): Fix an error for `Performance/MapMethodChain` when using `map` method chain without receiver. ([@koic][])
+* [#386](https://github.com/rubocop/rubocop-performance/issues/386): Fix a false negative for `Performance/StringIdentifierArgument` when using string interpolation. ([@earlopain][])
+* [#419](https://github.com/rubocop/rubocop-performance/pull/419): Make `Performance/Count`, `Performance/FixedSize`, `Performance/FlatMap`, `Performance/InefficientHashSearch`, `Performance/RangeInclude`, `Performance/RedundantSortBlock`, `Performance/ReverseFirst`, `Performance/SelectMap`, `Performance/Size`, `Performance/SortReverse`, and `Performance/TimesMap` cops aware of safe navigation operator. ([@koic][])
+* [#390](https://github.com/rubocop/rubocop-performance/issues/390): Fix a false negative for `Performance/ReverseEach` when safe navigation is between `reverse` and `each`. ([@fatkodima][])
+* [#401](https://github.com/rubocop/rubocop-performance/issues/401): Make `Performance/Sum` aware of safe navigation operator. ([@koic][])
+
+### Changes
+
+* [#389](https://github.com/rubocop/rubocop-performance/issues/389): Improve `Performance/MapCompact` to handle more safe navigation calls. ([@fatkodima][])
+* [#395](https://github.com/rubocop/rubocop-performance/issues/395): Enhance `Performance/StringInclude` to handle `===` method. ([@fatkodima][])
+* [#388](https://github.com/rubocop/rubocop-performance/pull/388): Require RuboCop 1.30+ as runtime dependency. ([@koic][])
+* [#380](https://github.com/rubocop/rubocop-performance/pull/380): Require RuboCop AST 1.30.0+. ([@koic][])
+
+[@koic]: https://github.com/koic
+[@earlopain]: https://github.com/earlopain
+[@fatkodima]: https://github.com/fatkodima