diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index fdea91a..3b48f7a 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
         with:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df5e4a3..80ad2ec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
         with:
@@ -42,7 +42,7 @@ jobs:
     continue-on-error: ${{ matrix.continue-on-error }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
         with:
diff --git a/.github/workflows/maturin.yml b/.github/workflows/maturin.yml
index 8856314..1eb9179 100644
--- a/.github/workflows/maturin.yml
+++ b/.github/workflows/maturin.yml
@@ -23,7 +23,7 @@ jobs:
       matrix:
         target: [x86_64]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: '3.10'
@@ -47,7 +47,7 @@ jobs:
       matrix:
         target: [x64]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: '3.10'
@@ -70,7 +70,7 @@ jobs:
       matrix:
         target: [x86_64, aarch64]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: '3.10'
@@ -89,7 +89,7 @@ jobs:
   sdist:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build sdist
         uses: PyO3/maturin-action@v1
         with:
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 7b955d3..8c01cc8 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -18,7 +18,7 @@ jobs:
           - os: ubuntu-latest
           - os: macos-latest
      steps:
-       - uses: actions/checkout@v3
+       - uses: actions/checkout@v4
        - uses: nixbuild/nix-quick-install-action@v26
        - run: nix flake check
        - run: nix build .#pysequoia