diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2fd76f..e61c1ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,5 @@
-v0.4.0 (in development)
------------------------
+v0.4.0 (2023-12-15)
+-------------------
 - Migrated from setuptools to hatch
 - Added a `set_headers` argument to the `Client` constructor for explicitly
   setting or not setting headers on sessions
diff --git a/src/ghreq/__init__.py b/src/ghreq/__init__.py
index 6eb7d01..1b9eb3e 100644
--- a/src/ghreq/__init__.py
+++ b/src/ghreq/__init__.py
@@ -49,7 +49,7 @@
 from typing import TYPE_CHECKING, Any, Literal, overload
 import requests
 
-__version__ = "0.4.0.dev1"
+__version__ = "0.4.0"
 __author__ = "John Thorvald Wodder II"
 __author_email__ = "ghreq@varonathe.org"
 __license__ = "MIT"