diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b13686..f0b8c6a 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]
+## [20211012]
 
 ### Added
 - Add support for PDF 2.0 (ISO 32000-2) AES-256 encryption ([#614](https://github.com/pdfminer/pdfminer.six/pull/614))
diff --git a/pdfminer/__init__.py b/pdfminer/__init__.py
index 5d9a0cd..4025c15 100644
--- a/pdfminer/__init__.py
+++ b/pdfminer/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '20201018'
+__version__ = '20211012'
 
 if __name__ == '__main__':
     print(__version__)