diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 2123161..a016af5 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -10,7 +10,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install poetry
         run: pipx install poetry
       - uses: actions/setup-python@v6
diff --git a/.github/workflows/draft-pdf.yml b/.github/workflows/draft-pdf.yml
index 861aa0e..5421691 100644
--- a/.github/workflows/draft-pdf.yml
+++ b/.github/workflows/draft-pdf.yml
@@ -6,7 +6,7 @@ jobs:
     name: Paper Draft
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Build draft PDF
         uses: openjournals/openjournals-draft-action@master
         with:
diff --git a/.github/workflows/gitlabsync.yml b/.github/workflows/gitlabsync.yml
index 3a0905c..0962dee 100644
--- a/.github/workflows/gitlabsync.yml
+++ b/.github/workflows/gitlabsync.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Git Repo Sync
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - uses: wangchucheng/git-repo-sync@v0.1.0
diff --git a/.github/workflows/static_html_deploy.yml b/.github/workflows/static_html_deploy.yml
index 2d0e0a4..dd15367 100644
--- a/.github/workflows/static_html_deploy.yml
+++ b/.github/workflows/static_html_deploy.yml
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: github-pages
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: develop
       - name: Install poetry