diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f9d0293..51cff242 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## v0.21.9 - 2023-11-10
+
+### Features
+- Make `ProcessListener` instances persistable [[98a375f]](https://github.com/aiidateam/plumpy/commit/98a375f07db0cacaacdc1545d4d12f25dd00bf1d)
+
+### Fixes
+- Catch `ChannelInvalidStateError` in process state change [[db2af9a]](https://github.com/aiidateam/plumpy/commit/db2af9acf7c139798a21e574d6308ae21b3b7513)
+
+### Devops
+- Update ReadTheDocs configuration file [[31f85c7]](https://github.com/aiidateam/plumpy/commit/31f85c71730b488aafd680f240485a51884722b7)
+
+
 ## v0.21.8 - 2023-06-07
 
 ### Devops
diff --git a/src/plumpy/__init__.py b/src/plumpy/__init__.py
index 13a561b2..fec0906a 100644
--- a/src/plumpy/__init__.py
+++ b/src/plumpy/__init__.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # pylint: disable=undefined-variable
 # mypy: disable-error-code="name-defined"
-__version__ = '0.21.8'
+__version__ = '0.21.9'
 
 import logging