diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e69b57ecf92..97a915fe6c1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -63,7 +63,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Setup vcpkg (Windows)
         run: gh run download -n vcpkg-cache -D C:/vcpkg/installed/
diff --git a/.github/workflows/check-links.yml b/.github/workflows/check-links.yml
index 889e42b2643..1b1094ae982 100644
--- a/.github/workflows/check-links.yml
+++ b/.github/workflows/check-links.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout the repository
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Link Checker
       id: lychee
diff --git a/.github/workflows/ci-caches.yml b/.github/workflows/ci-caches.yml
index c503bd745de..ba3130e99a6 100644
--- a/.github/workflows/ci-caches.yml
+++ b/.github/workflows/ci-caches.yml
@@ -116,7 +116,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Download GSHHG and DCW datasets
         run: bash ci/download-coastlines.sh
@@ -135,7 +135,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Install vcpkg libraries
         run: bash ci/install-dependencies-windows.sh
diff --git a/.github/workflows/code-validator.yml b/.github/workflows/code-validator.yml
index f2ae9c07679..d0b5ff580cb 100644
--- a/.github/workflows/code-validator.yml
+++ b/.github/workflows/code-validator.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Check PSL_strings.h
         run: |
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index e0fb4d57a3a..53ab6c0a289 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -88,7 +88,7 @@ jobs:
           fi
 
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       # Fix the git error:
       # "failed to run git: fatal: detected dubious ownership in repository at '/__w/gmt/gmt'"
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 63e19039f0d..2f7cb63b837 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -57,7 +57,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Setup vcpkg (Windows)
         run: gh run download -n vcpkg-cache -D C:/vcpkg/installed/
@@ -138,7 +138,7 @@ jobs:
           echo "${INSTALLDIR}/bin" >> $GITHUB_PATH
 
       - name: Checkout the gh-pages branch in a separate folder
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
         with:
           ref: gh-pages
           # Checkout to this folder instead of the current one
diff --git a/.github/workflows/dvc-diff.yml b/.github/workflows/dvc-diff.yml
index a626103f860..12f03c75bd4 100644
--- a/.github/workflows/dvc-diff.yml
+++ b/.github/workflows/dvc-diff.yml
@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Setup data version control (DVC)
       uses: iterative/setup-dvc@v2
diff --git a/.github/workflows/lint-checker.yml b/.github/workflows/lint-checker.yml
index a6261a5b296..35a0eeffa37 100644
--- a/.github/workflows/lint-checker.yml
+++ b/.github/workflows/lint-checker.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Check out repository
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Install cppcheck
       run: |
diff --git a/.github/workflows/release-baseline-images.yml b/.github/workflows/release-baseline-images.yml
index f32f79e5549..3552b1c93de 100644
--- a/.github/workflows/release-baseline-images.yml
+++ b/.github/workflows/release-baseline-images.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Setup data version control (DVC)
       uses: iterative/setup-dvc@v2
diff --git a/.github/workflows/remind.yml b/.github/workflows/remind.yml
index 4e3b23553e8..631bc312b79 100644
--- a/.github/workflows/remind.yml
+++ b/.github/workflows/remind.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Find and report known failures
       run: |
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7276b6a4716..43dd912447d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -60,7 +60,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Setup vcpkg (Windows)
         run: gh run download -n vcpkg-cache -D C:/vcpkg/installed/