diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
index fcc14e5..135c32a 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 e90440f..8693231 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 7ef62c3..2b2a38b 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 121c746..80ad997 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 226197f..bf86e95 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 c280467..d0ded0f 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 b0c912f..dec1c6d 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 8fe8bda..0cc2cef 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 1c0c101..f4edf10 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 49d3267..7e070bb 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