diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
index d037658..d783459 100644
--- a/.github/workflows/actionlint.yml
+++ b/.github/workflows/actionlint.yml
@@ -15,7 +15,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Download actionlint
         id: get_actionlint
         run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
diff --git a/.github/workflows/checkmake.yml b/.github/workflows/checkmake.yml
index f9995c9..f8043a7 100644
--- a/.github/workflows/checkmake.yml
+++ b/.github/workflows/checkmake.yml
@@ -14,5 +14,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: Uno-Takashi/checkmake-action@v2
diff --git a/.github/workflows/copyrights.yml b/.github/workflows/copyrights.yml
index 0950966..f102611 100644
--- a/.github/workflows/copyrights.yml
+++ b/.github/workflows/copyrights.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: yegor256/copyrights-action@0.0.12
diff --git a/.github/workflows/latexmk.yml b/.github/workflows/latexmk.yml
index 1f1e94a..7756842 100644
--- a/.github/workflows/latexmk.yml
+++ b/.github/workflows/latexmk.yml
@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: yegor256/latexmk-action@0.17.0
         with:
           opts: -pdf
diff --git a/.github/workflows/markdown-lint.yml b/.github/workflows/markdown-lint.yml
index bb245f5..04f883a 100644
--- a/.github/workflows/markdown-lint.yml
+++ b/.github/workflows/markdown-lint.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: DavidAnson/markdownlint-cli2-action@v20.0.0
diff --git a/.github/workflows/pdd.yml b/.github/workflows/pdd.yml
index fec6072..469bd02 100644
--- a/.github/workflows/pdd.yml
+++ b/.github/workflows/pdd.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: volodya-lombrozo/pdd-action@master
diff --git a/.github/workflows/reuse.yml b/.github/workflows/reuse.yml
index 6675af4..d14edff 100644
--- a/.github/workflows/reuse.yml
+++ b/.github/workflows/reuse.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: fsfe/reuse-action@v5
diff --git a/.github/workflows/typos.yml b/.github/workflows/typos.yml
index aa13226..40e80cb 100644
--- a/.github/workflows/typos.yml
+++ b/.github/workflows/typos.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: crate-ci/typos@v1.35.1
diff --git a/.github/workflows/xcop.yml b/.github/workflows/xcop.yml
index 75a3435..17513af 100644
--- a/.github/workflows/xcop.yml
+++ b/.github/workflows/xcop.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: g4s8/xcop-action@master
diff --git a/.github/workflows/yamllint.yml b/.github/workflows/yamllint.yml
index 6b54c51..e19628a 100644
--- a/.github/workflows/yamllint.yml
+++ b/.github/workflows/yamllint.yml
@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: ibiqlik/action-yamllint@v3