diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2e30bb6..22b6c56 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@ All notable changes in pdfminer.six will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [Unreleased]
+## [20220319]
 
 ### Added
 - Export type annotations from pypi package per PEP561 ([#679](https://github.com/pdfminer/pdfminer.six/pull/679))