diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd1f7fb..523404e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Version 0.6
+
+- Fix: `PIP_COMPILE_UPGRADE_PACKAGE` instead of `PIP_COMPILE_UPGRADE` in `upgrade-pkg` hatch command
+- Chg: Set `pip-compile-hashes = false` in `pyproject.toml`
+- Chg: Add `"Programming Language :: Python :: 3.12"`
+
 ## Version 0.5
 
 - Chg: remove note about adding `hatch config set dirs.env.virtual .direnv` as hatch is supported by VSC 1.88
diff --git a/{{cookiecutter.project_slug}}/README.md b/{{cookiecutter.project_slug}}/README.md
index cd6630d..40f9252 100644
--- a/{{cookiecutter.project_slug}}/README.md
+++ b/{{cookiecutter.project_slug}}/README.md
@@ -44,7 +44,6 @@ This package was created with [The Hatchlor] project template.
 [pipx]: https://pypa.github.io/pipx/
 [hatch]: https://hatch.pypa.io/
 [pre-commit]: https://pre-commit.com/
-[VS Code]: https://code.visualstudio.com/docs/python/environments#_where-the-extension-looks-for-environments
 {%- if cookiecutter.lock_file_support %}
 [hatch-pip-compile]: https://github.com/juftin/hatch-pip-compile
 {%- endif %}
diff --git a/{{cookiecutter.project_slug}}/pyproject.toml b/{{cookiecutter.project_slug}}/pyproject.toml
index 392e512..1cb9c7d 100644
--- a/{{cookiecutter.project_slug}}/pyproject.toml
+++ b/{{cookiecutter.project_slug}}/pyproject.toml
@@ -28,6 +28,7 @@ classifiers = [ # ToDo: Modify according to your needs!
     "Programming Language :: Python",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: Implementation :: CPython",
 ]
 # direct dependencies of this package, installed when users `pip install {{ cookiecutter.project_slug }}` later.
@@ -227,13 +228,13 @@ post-install-commands = ["pre-commit install"]
 type = "pip-compile"
 pip-compile-constraint = "default"  # keep locks between default & others consistent
 lock-filename = "locks/{env_name}.lock"
-pip-compile-hashes = true
+pip-compile-hashes = false  # no hashes in lock files
 {%- endif %}
 dependencies = []
 {%- if cookiecutter.lock_file_support %}
 [tool.hatch.envs.default.scripts]
 upgrade-all = "PIP_COMPILE_UPGRADE=1 hatch env run --env {env_name} -- python --version"
-upgrade-pkg = "PIP_COMPILE_UPGRADE='{args}' hatch env run --env {env_name} -- python --version"
+upgrade-pkg = "PIP_COMPILE_UPGRADE_PACKAGE='{args}' hatch env run --env {env_name} -- python --version"
 {%- endif %}
 
 # Test environment with test-only dependencies