diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e7c36cd..41974b1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
         output-type: [html, pdf]
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Build ${{ matrix.input-type }} to ${{ matrix.output-type }}
         uses: ./
@@ -50,7 +50,7 @@ jobs:
         valid-type: [valid, invalid]
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Validate ${{ matrix.input-type }} ${{ matrix.valid-type }}
         id: validate
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 03d8a7b..3469343 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
 
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index d486792..adce201 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f7f556e..aa3fdde 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
           release-type: simple
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Tag major and minor versions
         if: ${{ steps.release.outputs.release_created }}