diff --git a/.github/workflows/dependency_checker.yml b/.github/workflows/dependency_checker.yml
index 589ce20..2c893a8 100644
--- a/.github/workflows/dependency_checker.yml
+++ b/.github/workflows/dependency_checker.yml
@@ -8,10 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python 3.9
+    - name: Set up latest Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version-file: 'pyproject.toml'
     - name: Install dependencies
       run: |
         python -m pip install .[dev]
diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index b5627a1..57d1edb 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -18,9 +18,9 @@ jobs:
           - os: macos-latest
             python-version: '3.13'
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index fd795ac..ab34fba 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -9,11 +9,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.9
-      uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - name: Set up latest Python
+      uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version-file: 'pyproject.toml'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/prepare_release.yml b/.github/workflows/prepare_release.yml
index a755683..e1cf6fd 100644
--- a/.github/workflows/prepare_release.yml
+++ b/.github/workflows/prepare_release.yml
@@ -19,10 +19,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.10
+      - name: Set up latest Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version-file: 'pyproject.toml'
 
       - name: Install dependencies
         run: |
diff --git a/.github/workflows/readme.yml b/.github/workflows/readme.yml
index b3c3778..1ff4c1c 100644
--- a/.github/workflows/readme.yml
+++ b/.github/workflows/readme.yml
@@ -13,9 +13,9 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, macos-latest]  # skip windows bc rundoc fails
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index e1794ae..e7bf413 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -18,9 +18,9 @@ jobs:
           - os: macos-latest
             python-version: '3.13'
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies