diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a2e3c70..cedb0f0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
diff --git a/.github/workflows/test-linux.yml b/.github/workflows/test-linux.yml
index ec782a6..5f8d30e 100644
--- a/.github/workflows/test-linux.yml
+++ b/.github/workflows/test-linux.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
diff --git a/.github/workflows/test-macos.yml b/.github/workflows/test-macos.yml
index 98749a6..1c8ee75 100644
--- a/.github/workflows/test-macos.yml
+++ b/.github/workflows/test-macos.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: macOS-latest
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
diff --git a/.github/workflows/test-python-versions.yml b/.github/workflows/test-python-versions.yml
index dceeb79..1ccafd9 100644
--- a/.github/workflows/test-python-versions.yml
+++ b/.github/workflows/test-python-versions.yml
@@ -17,7 +17,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}