diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0279380..ddd3e60 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     steps:
       - name: Set git to use LF on Windows
         if: runner.os == 'Windows'
@@ -51,7 +51,7 @@ jobs:
         with:
           python-version: 3.x
       - name: Build source package
-        run: python setup.py sdist
+        run: pipx run build --sdist
       - name: Upload source package
         uses: actions/upload-artifact@v1
         with:
@@ -91,13 +91,13 @@ jobs:
         if: runner.os == 'Windows'
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
-          CIBW_BUILD: cp37-${{ matrix.name }}* pp*-${{ matrix.name }}*
+          CIBW_BUILD: cp38-${{ matrix.name }}* pp*-${{ matrix.name }}*
 
       - name: Build wheels for Linux and macOS
         if: runner.os != 'Windows'
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
-          CIBW_BUILD: cp37-${{ matrix.name }}* pp*-${{ matrix.name }}*
+          CIBW_BUILD: cp38-${{ matrix.name }}* pp*-${{ matrix.name }}*
           CIBW_ARCHS_LINUX: auto aarch64
           CIBW_BEFORE_BUILD_LINUX: yum install -y libffi-devel
       - uses: actions/upload-artifact@v2
diff --git a/example/README.md b/example/README.md
index 2898863..f352f7c 100644
--- a/example/README.md
+++ b/example/README.md
@@ -44,34 +44,30 @@ Build the project sdist locally
 
 ```
 $ cd example/
-$ python setup.py sdist
+$ pipx run build
 $ ls dist/
-example-brotli-project-0.1.0.tar.gz
+example_brotli_project-0.1.0-py3-none-any.whl  example_brotli_project-0.1.0.tar.gz
 ```
 
 ### Installing on CPython
 
-Run `python:3.7-slim` Docker image to test against CPython
+Run `python:3.12-slim` Docker image to test against CPython
 
 ```
-$ docker run --rm -it -v $(pwd)/dist:/dist python:3.7-slim /bin/bash
+$ docker run --rm -it -v $(pwd)/dist:/dist python:3.12-slim /bin/bash
 ```
 
 Install the example project
 
 ```
-$ python -m pip install /dist/example-brotli-project-0.1.0.tar.gz
-Processing /dist/example-brotli-project-0.1.0.tar.gz
-Collecting brotli
-  Downloading Brotli-1.0.9-cp37-cp37-manylinux1_x86_64.whl (357 kB)
-     |████████████████████████████████| 357 kB 1.9 MB/s 
-Building wheels for collected packages: example-brotli-project
-  Building wheel for example-brotli-project (setup.py) ... done
-  Created wheel for example-brotli-project: filename=example_brotli_project-0.1.0-py3-none-any.whl size=1976 sha256=b94975444c08cf82f395c8277e29b5b6f3b3270dd4f7d224482e4493be89c6bd
-  Stored in directory: /root/.cache/pip/wheels/be/67/36/911a88789436560de345984e6c4c3785098e98b92dcbab5980
-Successfully built example-brotli-project
+$ python -m pip install /dist/example_brotli_project-0.1.0-py3-none-any.whl
+Processing /dist/example_brotli_project-0.1.0-py3-none-any.whl
+Collecting brotli (from example-brotli-project==0.1.0)
+  Downloading Brotli-1.1.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (5.5 kB)
+Downloading Brotli-1.1.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (2.9 MB)
+   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.9/2.9 MB 10.5 MB/s eta 0:00:00
 Installing collected packages: brotli, example-brotli-project
-Successfully installed brotli-1.0.9 example-brotli-project-0.1.0
+Successfully installed brotli-1.1.0 example-brotli-project-0.1.0
 ```
 
 Notice that `Brotli` is installed from PyPI instead of `brotlicffi` on CPython.
@@ -87,23 +83,18 @@ Decompressed data: b'Hello, world!'
 
 ### Installing on PyPy
 
-Run `pypy:3.7-slim` Docker image to test against PyPy
+Run `pypy:3.10-slim` Docker image to test against PyPy
 
 ```
-$ docker run --rm -it -v $(pwd)/dist:/dist pypy:3.7-slim /bin/bash
-$ pypy -m pip install /dist/example-brotli-project-0.1.0.tar.gz
-Processing /dist/example-brotli-project-0.1.0.tar.gz
+$ docker run --rm -it -v $(pwd)/dist:/dist pypy:3.10-slim /bin/bash
+$ pypy -m pip install /dist/example_brotli_project-0.1.0-py3-none-any.whl 
+Processing /dist/example_brotli_project-0.1.0-py3-none-any.whl
 Collecting brotlicffi
-  Downloading brotlicffi-0.8.0-pp37-pypy37_pp73-manylinux1_x86_64.whl (341 kB)
-     |████████████████████████████████| 341 kB 2.8 MB/s 
-Requirement already satisfied: cffi>=1.0.0 in /opt/pypy/lib_pypy (from brotlicffi->example-brotli-project==0.1.0) (1.14.2)
-Building wheels for collected packages: example-brotli-project
-  Building wheel for example-brotli-project (setup.py) ... done
-  Created wheel for example-brotli-project: filename=example_brotli_project-0.1.0-py3-none-any.whl size=1976 sha256=566f5bfb3a0d74d11485b02b929a09d6e6cc8bab7c409cf30ff50f2067692356
-  Stored in directory: /root/.cache/pip/wheels/cb/e1/0f/337346ea74252e5b652824bb0f2fc82e81208f9f8e3de42465
-Successfully built example-brotli-project
+  Downloading brotlicffi-1.1.0.0-pp310-pypy310_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (378 kB)
+     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 378.6/378.6 kB 4.8 MB/s eta 0:00:00
+Requirement already satisfied: cffi>=1.0.0 in /opt/pypy/lib/pypy3.10 (from brotlicffi->example-brotli-project==0.1.0) (1.17.0.dev0)
 Installing collected packages: brotlicffi, example-brotli-project
-Successfully installed brotlicffi-0.8.0 example-brotli-project-0.1.0
+Successfully installed brotlicffi-1.1.0.0 example-brotli-project-0.1.0
 ```
 
 Notice now that `brotlicffi` is installed from PyPI instead of `Brotli` on CPython.
diff --git a/setup.py b/setup.py
index c545fd1..61748fd 100644
--- a/setup.py
+++ b/setup.py
@@ -98,7 +98,7 @@ def finalize_options(self):
     install_requires=[
         "cffi>=1.0.0",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     cffi_modules=["src/brotlicffi/_build.py:ffi"],
     packages=find_packages('src'),
     package_dir={'': 'src'},
@@ -113,7 +113,6 @@ def finalize_options(self):
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
diff --git a/tox.ini b/tox.ini
index 8e4db44..c0d5290 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37, py38, py39, py310, py311, py312, pypy, lint
+envlist = py38, py39, py310, py311, py312, pypy, lint
 
 [testenv]
 deps= -r{toxinidir}/test_requirements.txt