diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 8adee4e..f35ebcd 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -16,10 +16,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.11
+      - name: Set up Python 3.12
         uses: actions/setup-python@v4
         with:
-          python-version: 3.11
+          python-version: 3.12
 
       - name: Lint
         run: |
diff --git a/.github/workflows/prerelease.yml b/.github/workflows/prerelease.yml
index 4910b43..65a8655 100644
--- a/.github/workflows/prerelease.yml
+++ b/.github/workflows/prerelease.yml
@@ -24,10 +24,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.9
+      - name: Set up Python 3.12
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.12"
 
       - name: Install twine
         run: |
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 40edc3a..de71976 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -24,10 +24,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.11
+      - name: Set up Python 3.12
         uses: actions/setup-python@v4
         with:
-          python-version: "3.11"
+          python-version: "3.12"
 
       - name: Install twine
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8fc06ec..28eabfc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ac73c53..912801b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/psf/black
-  rev: 23.3.0
+  rev: 23.11.0
   hooks:
   - id: black
     name: black
@@ -23,7 +23,7 @@ repos:
     additional_dependencies: [".[jupyter]"]
 
 - repo: https://github.com/pycqa/flake8
-  rev: 6.0.0
+  rev: 6.1.0
   hooks:
   - id: flake8
     additional_dependencies:
@@ -52,7 +52,7 @@ repos:
       args: [--drop-empty-cells]
 
 - repo: https://github.com/asottile/pyupgrade
-  rev: v3.3.1
+  rev: v3.15.0
   hooks:
   - id: pyupgrade
     args: [--py39-plus]
@@ -64,7 +64,7 @@ repos:
     files: \.py$
 
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.4.0
+  rev: v4.5.0
   hooks:
     - id: check-builtin-literals
     - id: check-added-large-files
@@ -94,9 +94,10 @@ repos:
     additional_dependencies:
     - numpy
     - cython~=3.0.0b3
+    - wheel
 
 - repo: https://github.com/PyCQA/pydocstyle
-  rev: 6.1.1
+  rev: 6.3.0
   hooks:
   - id: pydocstyle
     files: landlab/.*\.py$
@@ -106,7 +107,7 @@ repos:
     additional_dependencies: [".[toml]"]
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v0.982
+  rev: v1.7.0
   hooks:
   - id: mypy
     additional_dependencies: [types-all]
diff --git a/news/19.misc b/news/19.misc
new file mode 100644
index 0000000..3d0bd59
--- /dev/null
+++ b/news/19.misc
@@ -0,0 +1,2 @@
+
+Added support for Python 3.12 and dropped support for Python 3.9.
diff --git a/noxfile.py b/noxfile.py
index 9763164..1bba906 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -5,11 +5,12 @@
 
 import nox
 
+PYTHON_VERSION = "3.12"
 PROJECT = "compaction"
 ROOT = pathlib.Path(__file__).parent
 
 
-@nox.session()
+@nox.session(python=PYTHON_VERSION, venv_backend="conda")
 def test(session: nox.Session) -> None:
     """Run the tests."""
     os.environ["WITH_OPENMP"] = "1"
@@ -34,7 +35,7 @@ def test(session: nox.Session) -> None:
         session.run("coverage", "report", "--ignore-errors", "--show-missing")
 
 
-@nox.session(name="test-cli")
+@nox.session(name="test-cli", python=PYTHON_VERSION, venv_backend="conda")
 def test_cli(session: nox.Session) -> None:
     """Test the command line interface."""
     session.install(".")
diff --git a/pyproject.toml b/pyproject.toml
index 4ab75cd..c79fed9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,13 +27,13 @@ classifiers = [
   "Operating System :: OS Independent",
   "Programming Language :: Cython",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: Implementation :: CPython",
   "Topic :: Scientific/Engineering :: Physics",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
 	"click",
 	"landlab",
@@ -108,7 +108,7 @@ line_length = 88
 ignore = [".nox", "build"]
 
 [tool.cibuildwheel]
-build = "cp39-* cp310-* cp311-*"
+build = "cp310-* cp311-* cp312-*"
 skip = "*-musllinux_*"
 archs = "x86_64,i686,aarch64,arm64,AMD64,x86"