diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0333fe7..8996e4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       matrix: ${{ steps.process_files.outputs.main_files }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Get changed tex files
         id: changed_files
@@ -67,7 +67,7 @@ jobs:
         files: ${{ fromJson(needs.changed_files.outputs.matrix) }}
     steps:
       - name: Check Out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Compile LaTeX document
         uses: xu-cheng/latex-action@v4
@@ -99,7 +99,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Get Artifact URLs
         id: get_artifact_urls
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ee93eb0..8205bc0 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
       matrix: ${{ steps.fetch_tex_files.outputs.tex_files }}
     steps:
       - name: Check Out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Fetch .tex file names
         id: fetch_tex_files
@@ -40,7 +40,7 @@ jobs:
         files: ${{ fromJson(needs.fetch_tex_files.outputs.matrix) }}
     steps:
       - name: Check Out
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Compile LaTeX document
         uses: xu-cheng/latex-action@v4
@@ -73,7 +73,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Get PR Number
         run: |
@@ -191,7 +191,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@0481980f17b760ef6bca5e8c55809102a0af1e5a