diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9ea2de7..e8a6cad 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,6 +12,6 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: pipx run build
       - uses: pypa/gh-action-pypi-publish@v1.8.10
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 01d409d..5d949e7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     name: Style
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: pipx run flake8 fftl
   tests:
     name: Tests
@@ -22,7 +22,7 @@ jobs:
       matrix:
         python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
@@ -32,11 +32,11 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: pipx run build
   docs:
     name: Docs
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: pipx run --spec '.[docs]' sphinx-build -W -b html docs _build/html