diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6b94195..5666dbf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,12 +1,18 @@
-## 5.4.0 (Next)
+## 5.5.1 (Next)
+
+* Your contribution here.
+
+## 5.5.0 (2026/03/15)
 
 * [#131](https://github.com/radar/distance_of_time_in_words/pull/131): Deprecates `highest_measure_only`. Adds alternate form of `highest_measures` option to permit rounding up whatever part of the duration was previously silently discarded - [@seansfkelley](https://github.com/seansfkelley).
 * [#133](https://github.com/radar/distance_of_time_in_words/pull/133): Test on Ruby 3.0 and 3.1 - [@dblock](https://github.com/dblock).
 * [#134](https://github.com/radar/distance_of_time_in_words/pull/134): Add support for Dzongkha, the National language of Bhutan - [@KinWang-2013](https://github.com/KinWang-2013).
 * [#135](https://github.com/radar/distance_of_time_in_words/pull/135): Add support for Ruby 2.7 and 3.2, removed support for ruby 2.4, 2.5, 2.6 and Rails 4 - [@KinWang-2013](https://github.com/KinWang-2013).
 * [#136](https://github.com/radar/distance_of_time_in_words/pull/136): Add support for Rails 7 - [@KinWang-2013](https://github.com/KinWang-2013).
-* [#139](https://github.com/radar/distance_of_time_in_words/pull/139): Fix bug with pluralization of Russian translations for numbers ending in 1 - [bitberry-dev](https://github.com/bitberry-dev).
-* Your contribution here.
+* [#139](https://github.com/radar/distance_of_time_in_words/pull/139): Fix bug with pluralization of Russian translations for numbers ending in 1 - [@bitberry-dev](https://github.com/bitberry-dev).
+* [#140](https://github.com/radar/distance_of_time_in_words/pull/140): Add Ruby 3.3 and 3.4 support, added logger - [@dblock](https://github.com/dblock).
+* [#141](https://github.com/radar/distance_of_time_in_words/pull/141): Fix flaky time calculation test by explicitly setting timezone - [@bitberry-dev](https://github.com/bitberry-dev).
+* Fix bug when accumulating on years - [@radar](https://github.com/radar).
 
 ## 5.3.3 (2022/04/25)
 
diff --git a/RELEASING.md b/RELEASING.md
new file mode 100644
index 0000000..e3ad265
--- /dev/null
+++ b/RELEASING.md
@@ -0,0 +1,71 @@
+# Releasing DOTIW
+
+There are no hard rules about when to release dotiw. Release bug fixes frequently, features not so frequently and breaking API changes rarely.
+
+## Release
+
+Run tests, check that all tests succeed locally.
+
+```
+bundle install
+rake
+```
+
+Check that the last build succeeded in [GitHub Actions](https://github.com/radar/distance_of_time_in_words/actions) for all supported platforms.
+
+Add a date to this release in [CHANGELOG.md](CHANGELOG.md).
+
+```
+## 5.5.1 (2026/03/28)
+```
+
+Remove the line with "Your contribution here.", since there will be no more contributions to this release.
+
+Commit your changes.
+
+```
+git add CHANGELOG.md lib/dotiw/version.rb
+git commit -m "Preparing for release, 5.5.1."
+git push origin master
+```
+
+Release.
+
+```
+rake release
+```
+
+This builds the gem, creates and pushes a git tag, and pushes the gem to [RubyGems](https://rubygems.org/gems/dotiw).
+
+```
+dotiw 5.5.1 built to pkg/dotiw-5.5.1.gem.
+Tagged v5.5.1.
+Pushed git commits and tags.
+Pushed dotiw 5.5.1 to rubygems.org.
+```
+
+Create a GitHub release for the tag using the `gh` CLI, passing the CHANGELOG entries for this version as the release notes.
+
+```
+gh release create v5.5.1 --title "5.5.1" --notes "$(sed -n '/^## 5.5.1/,/^## /p' CHANGELOG.md | sed '$d')"
+```
+
+## Prepare for the Next Version
+
+Add the next release to [CHANGELOG.md](CHANGELOG.md).
+
+```
+## 5.5.2 (Next)
+
+* Your contribution here.
+```
+
+Increment the patch version number in [lib/dotiw/version.rb](lib/dotiw/version.rb).
+
+Commit your changes.
+
+```
+git add CHANGELOG.md lib/dotiw/version.rb
+git commit -m "Preparing for next developer iteration, 5.5.2."
+git push origin master
+```
diff --git a/lib/dotiw/version.rb b/lib/dotiw/version.rb
index b02beb1..8cb8f64 100644
--- a/lib/dotiw/version.rb
+++ b/lib/dotiw/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module DOTIW
-  VERSION = '5.5.0'
+  VERSION = '5.5.1'
 end