diff --git a/docs/changelog.rst b/docs/changelog.rst
index 13a698fc..6aa1b01a 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -21,6 +21,10 @@ To avail of fixes in an unreleased version, please download a ZIP file
 In progress (unreleased)
 ------------------------
 
+
+v0.3.20 (2025-01-07)
+--------------------
+
 * :gh:issue:`1079` :mod:`ansible_mitogen`: Fix :ans:mod:`wait_for_connection`
   timeout with templated ``ansible_python_interpreter``
 * :gh:issue:`1079` :mod:`ansible_mitogen`: Fix templated python interpreter
diff --git a/mitogen/__init__.py b/mitogen/__init__.py
index 18932405..0a34c21b 100644
--- a/mitogen/__init__.py
+++ b/mitogen/__init__.py
@@ -35,7 +35,7 @@ be expected. On the slave, it is built dynamically during startup.
 
 
 #: Library version as a tuple.
-__version__ = (0, 3, 20, 'dev')
+__version__ = (0, 3, 21, 'dev')
 
 
 #: This is :data:`False` in slave contexts. Previously it was used to prevent