diff --git a/.github/workflows/build-book-pullrequest.yaml b/.github/workflows/build-book-pullrequest.yaml
index 72c38224..b78c0298 100644
--- a/.github/workflows/build-book-pullrequest.yaml
+++ b/.github/workflows/build-book-pullrequest.yaml
@@ -38,7 +38,7 @@ jobs:
         shell: bash -l {0}
     steps:
       - name: checkout files in repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 2
       - name: Check Changes
diff --git a/.github/workflows/build-book.yaml b/.github/workflows/build-book.yaml
index 65d97df0..a3fee16b 100644
--- a/.github/workflows/build-book.yaml
+++ b/.github/workflows/build-book.yaml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout files in repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 2
       - name: Check Changes
@@ -88,7 +88,7 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Build the book
         run: |
           # run notebooks
diff --git a/.github/workflows/deploy-preview.yaml b/.github/workflows/deploy-preview.yaml
index 0e471a27..2eeae36d 100644
--- a/.github/workflows/deploy-preview.yaml
+++ b/.github/workflows/deploy-preview.yaml
@@ -14,7 +14,7 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Fetch Repo Name
         id: repo-name
         run: echo "::set-output name=value::$(echo '${{ github.repository }}' | awk -F '/' '{print $2}')"  # just the repo name, not owner
diff --git a/.github/workflows/link-checker.yaml b/.github/workflows/link-checker.yaml
index 49c5bfec..357b4de1 100644
--- a/.github/workflows/link-checker.yaml
+++ b/.github/workflows/link-checker.yaml
@@ -32,7 +32,7 @@ jobs:
   link-checker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
diff --git a/.github/workflows/trigger-replace-links.yaml b/.github/workflows/trigger-replace-links.yaml
index c35faa53..e66d1a7e 100644
--- a/.github/workflows/trigger-replace-links.yaml
+++ b/.github/workflows/trigger-replace-links.yaml
@@ -10,7 +10,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Find and Replace Repository Name
         uses: jacobtomlinson/gha-find-replace@v3
         with: