diff --git a/.github/workflows/test_matrix.yml b/.github/workflows/test_matrix.yml
index 5a3c301..044acb0 100644
--- a/.github/workflows/test_matrix.yml
+++ b/.github/workflows/test_matrix.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4c1f478..7b21782 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
diff --git a/.github/workflows/valgrind.yml b/.github/workflows/valgrind.yml
index 7909492..31d7c9e 100644
--- a/.github/workflows/valgrind.yml
+++ b/.github/workflows/valgrind.yml
@@ -32,7 +32,7 @@ jobs:
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: false
 
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index cf238d6..3e74f22 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -15,7 +15,7 @@ jobs:
     name: Make SDist
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Build SDist
       run: pipx run build --sdist
@@ -34,7 +34,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true