diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4fab8fa..6047cbd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,35 @@
 # Changelog
 
+## 0.4.0 (2022-09-06)
+[Compare the full difference.](https://github.com/coordt/cookie-composer/compare/0.3.0...0.4.0)
+
+### New
+
+- Added subset of cookiecutter options to CLI. [a66f17a](https://github.com/coordt/cookie-composer/commit/a66f17a0471f7178742f9d8d80010bb8d6628cac)
+    
+- Added documentation images. [86113dc](https://github.com/coordt/cookie-composer/commit/86113dcb19588ede45cfedcebda7f6e840c3b652)
+    
+- Added template layer updating. [20c6fe3](https://github.com/coordt/cookie-composer/commit/20c6fe326955deb3514420abb12d2bfaef7353a7)
+    
+- Added layer naming convention. [5e61312](https://github.com/coordt/cookie-composer/commit/5e613121130a640ff6721fec322a9a948cfa7a1e)
+    
+### Other
+
+- [pre-commit.ci] pre-commit autoupdate. [e516a18](https://github.com/coordt/cookie-composer/commit/e516a181e4a3ebe3d3c93800ef8a059125494d82)
+    
+  **updates:** - [github.com/PyCQA/flake8: 4.0.1 → 5.0.4](https://github.com/PyCQA/flake8/compare/4.0.1...5.0.4)
+
+- [pre-commit.ci] pre-commit autoupdate. [3e6f695](https://github.com/coordt/cookie-composer/commit/3e6f695a3126c52beec1a1bcd3f39e4df09cc2ee)
+    
+  **updates:** - [github.com/psf/black: 22.3.0 → 22.6.0](https://github.com/psf/black/compare/22.3.0...22.6.0)
+
+### Updates
+
+- Updated documentation configuration. [a4c9652](https://github.com/coordt/cookie-composer/commit/a4c9652625f8e42df722f046f13a2f4e74f7c4bf)
+    
+- Updated README.md. [a7ead0d](https://github.com/coordt/cookie-composer/commit/a7ead0d745aae637948661e3bb6ac7a978b0d4a3)
+    
+
 ## 0.3.0 (2022-06-29)
 [Compare the full difference.](https://github.com/coordt/cookie-composer/compare/0.2.2...0.3.0)
 
diff --git a/CODEOWNERS b/CODEOWNERS
index 0f94a26..8f3ac5e 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -23,6 +23,7 @@ cookie_composer/cli.py coreyoordt@gmail.com
 cookie_composer/commands/__init__.py coreyoordt@gmail.com
 cookie_composer/commands/add.py coreyoordt@gmail.com
 cookie_composer/commands/create.py coreyoordt@gmail.com
+cookie_composer/commands/update.py coreyoordt@gmail.com
 cookie_composer/composition.py coreyoordt@gmail.com
 cookie_composer/data_merge.py coreyoordt@gmail.com
 cookie_composer/exceptions.py coreyoordt@gmail.com
@@ -41,6 +42,10 @@ docsrc/_includes/tutorial-composition-1.yaml coreyoordt@gmail.com
 docsrc/_includes/tutorial-composition-2.yaml coreyoordt@gmail.com
 docsrc/_includes/tutorial-composition-3.yaml coreyoordt@gmail.com
 docsrc/_static/css/custom.css coreyoordt@gmail.com
+docsrc/_static/img/composer-logo.svg coreyoordt@gmail.com
+docsrc/_static/img/compositions.png coreyoordt@gmail.com
+docsrc/_static/img/layers.png coreyoordt@gmail.com
+docsrc/_static/img/sandwiches.png coreyoordt@gmail.com
 docsrc/_templates/autosummary/base.rst coreyoordt@gmail.com
 docsrc/_templates/autosummary/class.rst coreyoordt@gmail.com
 docsrc/_templates/autosummary/module.rst coreyoordt@gmail.com
@@ -100,6 +105,7 @@ tests/fixtures/template2/{{cookiecutter.repo_name}}/requirements.txt coreyoordt@
 tests/test_cc_overrides.py coreyoordt@gmail.com
 tests/test_commands/test_add.py coreyoordt@gmail.com
 tests/test_commands/test_create.py coreyoordt@gmail.com
+tests/test_commands/test_update.py coreyoordt@gmail.com
 tests/test_composition.py coreyoordt@gmail.com
 tests/test_git_commands.py coreyoordt@gmail.com
 tests/test_layers.py coreyoordt@gmail.com
diff --git a/cookie_composer/__init__.py b/cookie_composer/__init__.py
index 683b7ad..d18c644 100644
--- a/cookie_composer/__init__.py
+++ b/cookie_composer/__init__.py
@@ -1,2 +1,2 @@
 """The Cookiecutter Composer."""
-__version__: str = "0.3.0"
+__version__: str = "0.4.0"
diff --git a/setup.cfg b/setup.cfg
index f8d11ea..9147159 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.0
+current_version = 0.4.0
 commit = True
 commit_args = --no-verify
 tag = True