diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea61fce7..54150425 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ 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).
 
-## [Unreleased]
+## [3.1.1] - 2021-05-08
 ### Added
 * *Nothing*