diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7715b50..9b02d2c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## [1.3.1] - 2024-01-09
 
 ### Fixed
 
@@ -123,7 +123,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Magic comments to allow reordering statements and trying alternative
   expressions
 
-[unreleased]: https://github.com/vsariola/pakettic/compare/v1.3.0...HEAD
+[unreleased]: https://github.com/vsariola/pakettic/compare/v1.3.1...HEAD
+[1.3.1]: https://github.com/vsariola/pakettic/releases/tag/v1.3.1
 [1.3.0]: https://github.com/vsariola/pakettic/releases/tag/v1.3.0
 [1.2.0]: https://github.com/vsariola/pakettic/releases/tag/v1.2.0
 [1.1.1]: https://github.com/vsariola/pakettic/releases/tag/v1.1.1
diff --git a/pyproject.toml b/pyproject.toml
index 35e9fe1..924b3d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pakettic"
-version = "1.3.1-dev"
+version = "1.3.1"
 description = "A tool for minifying and compressing TIC-80 fantasy console carts"
 authors = ["Veikko Sariola <5684185+vsariola@users.noreply.github.com>"]
 readme = "README.md"