diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0dc6ef8..4088e44 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.0] - 2026-05-19
+
 ### Added
 
 - `prune_chart_to_tree` (default `False`): when on, chart rows whose
@@ -14,6 +16,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   drawing. CLI form:
   `--prune-chart-to-tree / --no-prune-chart-to-tree`.
   ([#6](https://github.com/jbloomlab/tree-annotated-plot/issues/6))
+- `-h` is accepted as a short alias for `--help` on the
+  `tree-annotated-plot` CLI.
+
+### Changed
+
+- Minimum supported Python lowered from 3.13 to 3.11. CI still
+  runs on 3.13.
 
 ## [0.2.2] - 2026-05-09
 
diff --git a/README.md b/README.md
index 7157d08..3e52520 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ See [https://jbloomlab.github.io/tree-annotated-plot/](https://jbloomlab.github.
 
 ## Installation
 
-Released on [PyPI](https://pypi.org/project/tree-annotated-plot/). Requires Python 3.13+.
+Released on [PyPI](https://pypi.org/project/tree-annotated-plot/). Requires Python 3.11+.
 
 ```bash
 pip install tree-annotated-plot
diff --git a/docs/index.md b/docs/index.md
index eaa36d2..255f036 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -27,7 +27,7 @@ sit on by default (left for y-axis, bottom for x-axis).
 ## Installation
 
 Released on [PyPI](https://pypi.org/project/tree-annotated-plot/).
-Requires Python 3.13+.
+Requires Python 3.11+.
 
 ```bash
 pip install tree-annotated-plot
@@ -36,7 +36,7 @@ pip install tree-annotated-plot
 To pin a specific version:
 
 ```bash
-pip install tree-annotated-plot==0.0.1
+pip install tree-annotated-plot==0.3.0
 ```
 
 To install the bleeding edge directly from the
diff --git a/pyproject.toml b/pyproject.toml
index 74e12ec..385f11b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,15 +4,17 @@ build-backend = "hatchling.build"
 
 [project]
 name = "tree-annotated-plot"
-version = "0.2.2"
+version = "0.3.0"
 description = "Annotate the axis of an Altair / Vega-Lite plot with a phylogenetic tree."
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = ">=3.11"
 license = { file = "LICENSE" }
 authors = [{ name = "Jesse Bloom", email = "jbloom@fredhutch.org" }]
 classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Operating System :: OS Independent",
     "Topic :: Scientific/Engineering :: Bio-Informatics",
@@ -52,7 +54,7 @@ packages = ["src/tree_annotated_plot"]
 dev-mode-dirs = ["src"]
 
 [tool.black]
-target-version = ["py313"]
+target-version = ["py311"]
 
 [tool.ruff]
-target-version = "py313"
+target-version = "py311"
diff --git a/src/tree_annotated_plot/cli.py b/src/tree_annotated_plot/cli.py
index b45c99c..7039885 100644
--- a/src/tree_annotated_plot/cli.py
+++ b/src/tree_annotated_plot/cli.py
@@ -263,6 +263,7 @@ def _stack_config_options(command: Any) -> Any:
         "Save the result as HTML / JSON / PNG / SVG / PDF "
         "(format is dispatched on --output's extension)."
     ),
+    context_settings={"help_option_names": ["-h", "--help"]},
 )
 @click.option(
     "--tree",
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 43148d1..2723c5a 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -27,6 +27,14 @@ def test_help_lists_data_options() -> None:
     assert "--output" in result.output
 
 
+def test_short_help_flag_is_alias_for_long() -> None:
+    """`-h` should produce identical output to `--help`."""
+    long_form = _runner().invoke(main, ["--help"])
+    short_form = _runner().invoke(main, ["-h"])
+    assert short_form.exit_code == 0
+    assert short_form.output == long_form.output
+
+
 def test_help_lists_auto_generated_options() -> None:
     """A handful of PlotConfig-derived options should appear in --help."""
     result = _runner().invoke(main, ["--help"])