diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5525ff2..c730d1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,5 @@
-v0.4.0 (in development)
------------------------
+v0.4.0 (2023-05-03)
+-------------------
 - Drop support for Python 3.6
 - Support Python 3.11
 - Added `--start-time` and `--end-time` command-line options
diff --git a/README.rst b/README.rst
index dba466f..e063d0d 100644
--- a/README.rst
+++ b/README.rst
@@ -172,4 +172,4 @@ The following input file:
 
 produces (using the default options) an output file that looks like this:
 
-.. image:: https://github.com/jwodder/schedule/raw/v0.3.4/examples/example01.png
+.. image:: https://github.com/jwodder/schedule/raw/v0.4.0/examples/example01.png
diff --git a/src/pdfschedule.py b/src/pdfschedule.py
index 6055a95..875435c 100644
--- a/src/pdfschedule.py
+++ b/src/pdfschedule.py
@@ -6,7 +6,7 @@
 more information.
 """
 
-__version__ = "0.4.0.dev1"
+__version__ = "0.4.0"
 __author__ = "John Thorvald Wodder II"
 __author_email__ = "pdfschedule@varonathe.org"
 __license__ = "MIT"