diff --git a/.readthedocs.yml b/.readthedocs.yml
index ec839c5..f26bd16 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,3 +1,4 @@
+---
 # .readthedocs.yml
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
@@ -9,16 +10,15 @@ version: 2
 sphinx:
   configuration: docs/conf.py
 
-# Build documentation with MkDocs
-#mkdocs:
-#  configuration: mkdocs.yml
-
 # Optionally build your docs in additional formats such as PDF
 formats:
   - pdf
 
-# Optionally set the version of Python and requirements required to build your docs
+# Optionally set the version of Python and requirements required to build your
+# docs
 python:
   version: 3.7
   install:
     - requirements: docs/requirements.txt
+    - method: pip
+      path: .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00ae1c8..9b1b282 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 All notable changes in **python-transip** are documented below.
 
 ## [Unreleased]
+
+## [0.4.0] (2021-01-24)
 ### Added
 - This `CHANGELOG.md` file to be able to list all notable changes for each version of **python-transip**.
 - The `transip.TransIP.api_test` service to allow calling the test resource to make sure everything is working.
@@ -12,4 +14,5 @@ All notable changes in **python-transip** are documented below.
 - The option to update the content of a single DNS record from the `transip.v6.objects.Domain.dns` service, as well as from the `transip.v6.objects.DnsEntry` object.
 - The option to replace all existing DNS records of a single domain at once from the `transip.v6.objects.Domain.dns` service.
 
-[Unreleased]: https://github.com/roaldnefs/python-transip/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/roaldnefs/python-transip/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/roaldnefs/python-transip/compare/v0.3.0...v0.4.0
diff --git a/transip/__init__.py b/transip/__init__.py
index 70c1c75..d07d42e 100644
--- a/transip/__init__.py
+++ b/transip/__init__.py
@@ -30,7 +30,7 @@
 
 
 __title__ = "python-transip"
-__version__ = "0.3.0"
+__version__ = "0.4.0"
 __author__ = "Roald Nefs"
 __email__ = "info@roaldnefs.com"
 __copyright__ = "Copyright 2020-2021, Roald Nefs"