diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97a05dc..0fb59be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## [0.4.0] 2024-03-08
 
 ### Added
 
diff --git a/pyproject.toml b/pyproject.toml
index 38f2316..ab2bd57 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ doctest_optionflags = [
 # ============================================================================
 
 [tool.bumpversion]
-current_version = "0.3.4"
+current_version = "0.4.0"
 message = "Bump version to {new_version}"
 commit = true
 tag = true
diff --git a/src/compas_notebook/__init__.py b/src/compas_notebook/__init__.py
index 6b163fa..941f867 100644
--- a/src/compas_notebook/__init__.py
+++ b/src/compas_notebook/__init__.py
@@ -7,7 +7,7 @@
 __copyright__ = "ETH Zurich - Block Research Group"
 __license__ = "MIT License"
 __email__ = "tom.v.mele@gmail.com"
-__version__ = "0.3.4"
+__version__ = "0.4.0"
 
 
 HERE = os.path.dirname(__file__)