diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b88b0a..082e094 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changes
 
-## Unreleased
+## [0.4.0] - 2024-06-11
 
 - Enhanced `fixed_geometry`, adding option to fix antimeridian issues.
 - Moved functionality to manipulate GeoTIFF files to separate module to enhance
diff --git a/setup.cfg b/setup.cfg
index 2d5132d..e2c4fde 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = cldfgeojson
-version = 0.3.1.dev0
+version = 0.4.0
 author = Robert Forkel
 author_email = dlce.rdm@eva.mpg.de
 description = Functionality to access and curate GeoJSON in CLDF datasets
diff --git a/src/cldfgeojson/__init__.py b/src/cldfgeojson/__init__.py
index 8b284b6..96d6de3 100644
--- a/src/cldfgeojson/__init__.py
+++ b/src/cldfgeojson/__init__.py
@@ -1,4 +1,4 @@
 from .geojson import *  # noqa: F403 F401
 from .create import *  # noqa: F403 F401
 
-__version__ = '0.3.1.dev0'
+__version__ = '0.4.0'