diff --git a/.github/workflows/markdown-code-runner.yml b/.github/workflows/markdown-code-runner.yml
index fa197bd..bf26c7e 100644
--- a/.github/workflows/markdown-code-runner.yml
+++ b/.github/workflows/markdown-code-runner.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           fetch-depth: 0
diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index fe0193d..73066bb 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -11,7 +11,7 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
diff --git a/.github/workflows/pythonpublish.yml b/.github/workflows/pythonpublish.yml
index f38af81..92713a9 100644
--- a/.github/workflows/pythonpublish.yml
+++ b/.github/workflows/pythonpublish.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
diff --git a/README.md b/README.md
index dff3614..ff6e6ec 100644
--- a/README.md
+++ b/README.md
@@ -258,7 +258,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           fetch-depth: 0