diff --git a/.cirrus.yml b/.cirrus.yml
index a52b4f0d5..d632575a7 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -16,6 +16,7 @@ linux_arm64_task:
       - IMAGE: "python:3.9-slim"
       - IMAGE: "python:3.10-slim"
       - IMAGE: "python:3.11-slim"
+      - IMAGE: "python:3.12-slim"
   arm_container:
     image: $IMAGE
   install_script:
@@ -35,6 +36,7 @@ macosx_arm64_task:
       - PYTHON: "3.9"
       - PYTHON: "3.10"
       - PYTHON: "3.11"
+      - PYTHON: "3.12"
   install_script:
     - brew update
     - brew install pyenv
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aa05b14ac..9bc823788 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  STABLE_PYTHON_VERSION: "3.11"
+  STABLE_PYTHON_VERSION: "3.12"
   CIBW_BUILD_FRONTEND: build
   CIBW_TEST_COMMAND: >
     python -c
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d6785a55d..96dc5f956 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  STABLE_PYTHON_VERSION: "3.11"
+  STABLE_PYTHON_VERSION: "3.12"
   PYTEST_ADDOPTS: --color=yes
 
 jobs:
@@ -28,12 +28,12 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         experimental: [false]
         include:
           - # Run tests against the next Python version, but no need for the full list of OSes.
             os: ubuntu-latest
-            python-version: "3.12-dev"
+            python-version: "3.13-alpha.0 - 3.13"
             experimental: true
 
     steps:
diff --git a/pyproject.toml b/pyproject.toml
index 5b96caacd..db0794426 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ classifiers = [
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3 :: Only",
   "Topic :: Software Development :: Testing",
 ]
@@ -62,7 +63,7 @@ types = [
   "types-requests ~= 2.0",
 ]
 test = [
-  "aiohttp[speedups] ~= 3.0",
+  "aiohttp[speedups] ~= 3.9b",
   "coverage[toml]    ~= 7.0",
   "flask[async]      ~= 3.0",
   "httpx             ~= 0.0",
@@ -85,14 +86,20 @@ dev = [
 ################################################################################
 
 [build-system]
-requires      = ["hatchling", "packaging", "requests", "cffi"]
+requires = [
+  "hatchling",
+  "packaging",
+  "requests",
+  "cffi",
+  "setuptools ; python_version >= '3.12'",
+]
 build-backend = "hatchling.build"
 
 [tool.hatch.version]
 path = "pact/__version__.py"
 
 [tool.hatch.build]
-include   = ["pact/**/*.py", "*.md", "LICENSE"]
+include = ["pact/**/*.py", "*.md", "LICENSE"]
 
 [tool.hatch.build.targets.wheel]
 # Ignore the data files in the wheel as their contents are already included
@@ -108,8 +115,14 @@ artifacts = ["pact/bin/*", "pact/lib/*"]
 # Install dev dependencies in the default environment to simplify the developer
 # workflow.
 [tool.hatch.envs.default]
-features           = ["dev"]
-extra-dependencies = ["hatchling", "packaging", "requests", "cffi"]
+features = ["dev"]
+extra-dependencies = [
+  "hatchling",
+  "packaging",
+  "requests",
+  "cffi",
+  "setuptools ; python_version >= '3.12'",
+]
 
 [tool.hatch.envs.default.scripts]
 lint    = ["black --check --diff {args:.}", "ruff {args:.}", "mypy {args:.}"]
@@ -123,7 +136,7 @@ all     = ["lint", "test", "example"]
 features = ["test"]
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.8", "3.9", "3.10", "3.11"]
+python = ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
 [tool.hatch.envs.test.scripts]
 test    = "pytest {args:tests/}"
@@ -155,9 +168,9 @@ filterwarnings = [
 [tool.coverage.report]
 exclude_lines = [
   "if __name__ == .__main__.:", # Ignore non-runnable code
-  "if TYPE_CHECKING:", # Ignore typing
-  "raise NotImplementedError", # Ignore defensive assertions
-  "@(abc\\.)?abstractmethod", # Ignore abstract methods
+  "if TYPE_CHECKING:",          # Ignore typing
+  "raise NotImplementedError",  # Ignore defensive assertions
+  "@(abc\\.)?abstractmethod",   # Ignore abstract methods
 ]
 
 ################################################################################