diff --git a/docs/changelog.rst b/docs/changelog.rst
index eb5e05e..78a08eb 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -3,6 +3,12 @@ Change log
 
 .. currentmodule:: picozero
 
+0.4.2 - 2023-05-12
+------------------
+
++ Bug fix relating to DigitalInputDevice bounce times
++ Updated tests after a change in micropython 1.20+
+
 0.4.1 - 2022-12-22
 ------------------
 
diff --git a/docs/conf.py b/docs/conf.py
index 3afb34a..7438ce6 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -47,7 +47,7 @@ def __getattr__(cls, name):
 author = 'Raspberry Pi Foundation'
 
 # The full version, including alpha/beta/rc tags
-release = '0.4.1'
+release = '0.4.2'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/picozero/__init__.py b/picozero/__init__.py
index 8e8fb43..794583e 100644
--- a/picozero/__init__.py
+++ b/picozero/__init__.py
@@ -1,6 +1,6 @@
 __name__ = "picozero"
 __package__ = "picozero"
-__version__ = '0.4.1'
+__version__ = '0.4.2'
 __author__ = "Raspberry Pi Foundation"
 
 from .picozero import (
diff --git a/setup.py b/setup.py
index 03755d7..73f6af5 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 __project__ = 'picozero'
 __packages__ = ['picozero']
 __desc__ = 'A beginner-friendly library for using common electronics components with the Raspberry Pi Pico. '
-__version__ = '0.4.1'
+__version__ = '0.4.2'
 __author__ = "Raspberry Pi Foundation"
 __author_email__ = 'learning@raspberrypi.org'
 __license__ = 'MIT'