diff --git a/CHANGELOG b/CHANGELOG.md
similarity index 83%
rename from CHANGELOG
rename to CHANGELOG.md
index a6320c5..9a042a4 100644
--- a/CHANGELOG
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ 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 (work is currently in progress on 1.0.0)
+## Unreleased
+
+Nothing yet.
+
+## [1.0.0] - 2020-04-05
 
 Initial release.