diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 37ee308..1cf8226 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6
diff --git a/.github/workflows/flake8_py_version_check.yml b/.github/workflows/flake8_py_version_check.yml
index af5a52d..3cae07b 100644
--- a/.github/workflows/flake8_py_version_check.yml
+++ b/.github/workflows/flake8_py_version_check.yml
@@ -8,7 +8,7 @@ jobs:
   check-versions:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python3
       uses: actions/setup-python@v6
       with:
diff --git a/.github/workflows/pypi_upload.yml b/.github/workflows/pypi_upload.yml
index 5a995ff..4f52de7 100644
--- a/.github/workflows/pypi_upload.yml
+++ b/.github/workflows/pypi_upload.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python
       uses: actions/setup-python@v6