diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 81a53fe..ab35af2 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
-        python-version: '3.8'
+        python-version: '3.9'
 
     - name: Install pre-commit
       run: |
@@ -32,15 +32,15 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['pypy-3.7', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12-dev']
+        python-version: ['pypy-3.9', '3.9', '3.10', '3.11', '3.12', '3.13-dev']
         os: [ubuntu-latest, macos-latest, windows-latest]
-    continue-on-error: ${{ matrix.python-version == '3.12-dev' }}
+    continue-on-error: ${{ matrix.python-version == '3.13-dev' }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -54,7 +54,7 @@ jobs:
 
     - name: Report coverage
       if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.10'
-      uses: codecov/codecov-action@v2
+      uses: codecov/codecov-action@v4
 
   allgood:
     runs-on: ubuntu-latest
@@ -70,10 +70,10 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
-        python-version: '3.7'
+        python-version: '3.x'
     - name: Install build and publish tools
       run: |
         pip install build twine
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8cb7071..3da57a2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -23,10 +23,6 @@ repos:
   rev: e87737140f32d3cd7c44ede75f02dcd58e55820e  # frozen: 23.9.1
   hooks:
   - id: black
-- repo: https://github.com/PyCQA/docformatter
-  rev: dfefe062799848234b4cd60b04aa633c0608025e  # frozen: v1.7.5
-  hooks:
-  - id: docformatter
 - repo: https://github.com/pre-commit/pre-commit-hooks
   rev: f71fa2c1f9cf5cb705f73dffe4b21f7c61470ba9  # frozen: v4.4.0
   hooks:
diff --git a/pyproject.toml b/pyproject.toml
index aa59df2..f9a1568 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ authors = [
     { name = "Taneli Hukkinen", email = "hukkin@users.noreply.github.com" },
 ]
 license = { file = "LICENSE" }
-requires-python = ">=3.7"
+requires-python = ">=3.9"
 readme = "README.md"
 classifiers = [
     "License :: OSI Approved :: MIT License",
@@ -18,10 +18,6 @@ classifiers = [
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Software Development :: Libraries :: Python Modules",
@@ -56,10 +52,10 @@ xfail_strict = true
 legacy_tox_ini = '''
 [tox]
 # Only run pytest envs when no args given to tox
-envlist = py{37,38,39,310}
+envlist = py{39,310,311,312}
 isolated_build = True
 
-[testenv:py{37,38,39,310}]
+[testenv:py{39,310,311,312}]
 description = run tests against a built package
 deps = -r tests/requirements.txt
 commands =