diff --git a/.github/workflows/build-book.yaml b/.github/workflows/build-book.yaml
index 76b81c6..9d8cb95 100644
--- a/.github/workflows/build-book.yaml
+++ b/.github/workflows/build-book.yaml
@@ -52,7 +52,7 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build the book
         run: |
           # copy baltrad notebooks to book dir
diff --git a/.github/workflows/deploy-preview.yaml b/.github/workflows/deploy-preview.yaml
index e7a2231..f310ddb 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@v3
+      - uses: actions/checkout@v4
       - 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 0b733ba..be2fcc0 100644
--- a/.github/workflows/link-checker.yaml
+++ b/.github/workflows/link-checker.yaml
@@ -35,7 +35,7 @@ jobs:
         uses: styfle/cancel-workflow-action@0.12.0
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Mambaforge
         uses: conda-incubator/setup-miniconda@v3