diff --git a/CHANGELOG.md b/CHANGELOG.md
index 18e0289c..61860716 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,35 @@
 # Changelog
 
+## [0.4.0](https://github.com/python-kasa/python-kasa/tree/0.4.0) (2021-09-26)
+
+[Full Changelog](https://github.com/python-kasa/python-kasa/compare/0.4.0.dev5...0.4.0)
+
+**Implemented enhancements:**
+
+- Fix lock being unexpectedly reset on close [\#218](https://github.com/python-kasa/python-kasa/pull/218) ([bdraco](https://github.com/bdraco))
+- Avoid calling pformat unless debug logging is enabled [\#217](https://github.com/python-kasa/python-kasa/pull/217) ([bdraco](https://github.com/bdraco))
+
+**Closed issues:**
+
+- Debug logging in protocol.py is the majority of the execution time [\#216](https://github.com/python-kasa/python-kasa/issues/216)
+
+**Merged pull requests:**
+
+- Add github workflow for pypi publishing [\#220](https://github.com/python-kasa/python-kasa/pull/220) ([rytilahti](https://github.com/rytilahti))
+- Add host information to protocol debug logs [\#219](https://github.com/python-kasa/python-kasa/pull/219) ([rytilahti](https://github.com/rytilahti))
+
 ## [0.4.0.dev5](https://github.com/python-kasa/python-kasa/tree/0.4.0.dev5) (2021-09-24)
 
 [Full Changelog](https://github.com/python-kasa/python-kasa/compare/0.4.0.dev4...0.4.0.dev5)
 
+**Implemented enhancements:**
+
+- Keep connection open and lock to prevent duplicate requests [\#213](https://github.com/python-kasa/python-kasa/pull/213) ([bdraco](https://github.com/bdraco))
+
 **Merged pull requests:**
 
+- Release 0.4.0.dev5 [\#215](https://github.com/python-kasa/python-kasa/pull/215) ([rytilahti](https://github.com/rytilahti))
 - Add KL130 fixture, initial lightstrip tests [\#214](https://github.com/python-kasa/python-kasa/pull/214) ([rytilahti](https://github.com/rytilahti))
-- Keep connection open and lock to prevent duplicate requests [\#213](https://github.com/python-kasa/python-kasa/pull/213) ([bdraco](https://github.com/bdraco))
 - Cleanup discovery & add tests [\#212](https://github.com/python-kasa/python-kasa/pull/212) ([rytilahti](https://github.com/rytilahti))
 
 ## [0.4.0.dev4](https://github.com/python-kasa/python-kasa/tree/0.4.0.dev4) (2021-09-23)
diff --git a/README.md b/README.md
index e1136d1f..89e4f630 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,9 @@ This project is a maintainer-made fork of [pyHS100](https://github.com/GadgetRea
 
 ## Getting started
 
-You can install the most recent release using pip. Until
+You can install the most recent release using pip:
 ```
-pip install python-kasa --pre
+pip install python-kasa
 ```
 
 Alternatively, you can clone this repository and use poetry to install the development version:
diff --git a/RELEASING.md b/RELEASING.md
index fc01a87d..adc8a05e 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -39,25 +39,13 @@ git fetch upstream
 git rebase upstream/master
 ```
 
-5. Tag the release (add short changelog as a tag commit message), push the tag to git
+7. Tag the release (add short changelog as a tag commit message), push the tag to git
 
 ```bash
 git tag -a $NEW_RELEASE
 git push upstream $NEW_RELEASE
 ```
 
-7. Upload new version to pypi
-
-If not done already, create an API key for pypi (https://pypi.org/manage/account/token/) and configure it:
-```
-poetry config pypi-token.pypi <token>
-```
-
-To build & release:
-
-```bash
-poetry build
-poetry publish
-```
+All tags on master branch will trigger a new release on pypi.
 
 8. Click the "Draft a new release" button on github, select the new tag and copy & paste the changelog into the description.
diff --git a/pyproject.toml b/pyproject.toml
index efcf92bd..37542906 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "python-kasa"
-version = "0.4.0.dev5"
+version = "0.4.0"
 description = "Python API for TP-Link Kasa Smarthome devices"
 license = "GPL-3.0-or-later"
 authors = ["Your Name <you@example.com>"]
@@ -9,6 +9,7 @@ readme = "README.md"
 packages = [
   { include = "kasa" }
 ]
+include = ["CHANGELOG.md"]
 
 [tool.poetry.scripts]
 kasa = "kasa.cli:cli"