diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9e3ea8e3..b7c113ec 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -35,7 +35,6 @@ env:
   # see https://github.com/python/mypy/issues/13817
   TERM: xterm-256color
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-  COVERALLS_PARALLEL: true
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -48,7 +47,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        python-version: ["3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
       fail-fast: false
 
     steps:
@@ -59,29 +58,14 @@ jobs:
           cache: "pip"
           cache-dependency-path: "pyproject.toml"
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
       - run: pip install "wheel<1"
-      - run: pip install "coveralls>=3.3" -e .[pytest]
+      - run: pip install -e .[pytest]
       - run: pip freeze --all
       - name: Run tests under coverage
         run: |
           coverage run -m pytest --doctest-modules
           coverage report --no-skip-covered
-      - name: Upload coverage to coveralls
-        if: github.repository == 'AlexWaygood/typeshed-stats'
-        env:
-          COVERALLS_FLAG_NAME: ${{ matrix.os }}-${{ matrix.python-version }}
-        run: coveralls --service=github
-
-  coveralls-finish:
-    name: Indicate completion to coveralls.io
-    needs: pytest-tests
-    if: github.repository == 'AlexWaygood/typeshed-stats'
-    runs-on: ubuntu-latest
-    container: python:3-slim
-    steps:
-      - run: |
-          pip install "coveralls>=3.3"
-          coveralls --service=github --finish
 
   create-issue-on-failure:
     name: Create an issue if daily test failed
diff --git a/README.md b/README.md
index 40903265..076650df 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 
 <br>
 
-[![website](https://img.shields.io/website?down_color=red&down_message=Offline&style=for-the-badge&up_color=green&up_message=Running&url=https%3A%2F%2Falexwaygood.github.io%2Ftypeshed-stats%2F)](https://alexwaygood.github.io/typeshed-stats/)[![build status](https://img.shields.io/github/actions/workflow/status/AlexWaygood/typeshed-stats/test.yml?branch=main&label=Tests&style=for-the-badge)](https://github.com/AlexWaygood/typeshed-stats/actions/workflows/test.yml)[![Coveralls](https://img.shields.io/coverallsCoverage/github/AlexWaygood/typeshed-stats?style=for-the-badge)](https://coveralls.io/github/AlexWaygood/typeshed-stats)
+[![website](https://img.shields.io/website?down_color=red&down_message=Offline&style=for-the-badge&up_color=green&up_message=Running&url=https%3A%2F%2Falexwaygood.github.io%2Ftypeshed-stats%2F)](https://alexwaygood.github.io/typeshed-stats/)[![build status](https://img.shields.io/github/actions/workflow/status/AlexWaygood/typeshed-stats/test.yml?branch=main&label=Tests&style=for-the-badge)](https://github.com/AlexWaygood/typeshed-stats/actions/workflows/test.yml)
 <br>
 [![Checked with mypy](https://img.shields.io/badge/mypy-checked-blue?style=for-the-badge)](http://mypy-lang.org/)[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg?style=for-the-badge)](https://github.com/psf/black)[![Imports: isort](https://img.shields.io/badge/%20imports-isort-%231674b1?style=for-the-badge&labelColor=ef8336)](https://pycqa.github.io/isort/)[![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white&style=for-the-badge)](https://pre-commit.ci)
 <br>
diff --git a/pyproject.toml b/pyproject.toml
index 9bc4c83f..fb0c6187 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
     "Topic :: Software Development",
@@ -32,7 +33,8 @@ classifiers = [
 dependencies = [
     "attrs>=22.2.0",
     "cattrs",
-    "aiohttp[speedups]",
+    "aiohttp[speedups]; python_version <'3.12'",
+    "aiohttp[speedups]>=3.9.0b0,<4; python_version >= '3.12'",
     "packaging",
     "pathspec>=0.10.3",  # needs to be py.typed
     "Jinja2>=3",
@@ -63,7 +65,7 @@ pytest = [
     "typeshed-stats[rich]",
     "beautifulsoup4>=4,<5",
     "covdefaults==2.3.0",
-    "coverage==6.5.0",
+    "coverage==7.3.2",
     "Markdown>=3,<4",
     "pytest==7.4.2",
     "pytest-antilru==1.1.1",