diff --git a/.github/workflows/pypi.yaml b/.github/workflows/pypi.yaml
index 916ab58..25a0798 100644
--- a/.github/workflows/pypi.yaml
+++ b/.github/workflows/pypi.yaml
@@ -18,7 +18,7 @@ jobs:
     if: github.repository == 'OSOceanAcoustics/echoshader'
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         # fetch all history so that setuptools-scm works
         fetch-depth: 0
diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index 5a72a68..d9bdbd5 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -13,7 +13,7 @@ jobs:
         experimental: [false]
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Python
         uses: actions/setup-python@v6
         with: