diff --git a/.github/workflows/_build-packages.yml b/.github/workflows/_build-packages.yml
index 78035470059d1..9a4a7813a7f56 100644
--- a/.github/workflows/_build-packages.yml
+++ b/.github/workflows/_build-packages.yml
@@ -25,7 +25,7 @@ jobs:
       matrix:
         pkg-name: ${{ fromJSON(inputs.pkg-names) }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"
diff --git a/.github/workflows/_legacy-checkpoints.yml b/.github/workflows/_legacy-checkpoints.yml
index 03fadc1247f16..8cceb5870af8d 100644
--- a/.github/workflows/_legacy-checkpoints.yml
+++ b/.github/workflows/_legacy-checkpoints.yml
@@ -55,7 +55,7 @@ jobs:
     outputs:
       pl-version: ${{ steps.decide-version.outputs.pl-version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: actions/setup-python@v5
         with:
@@ -135,7 +135,7 @@ jobs:
     env:
       PL_VERSION: ${{ needs.create-legacy-ckpts.outputs.pl-version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ref: master
 
diff --git a/.github/workflows/ci-pkg-install.yml b/.github/workflows/ci-pkg-install.yml
index 7a7f4bfdcf955..accec3a2339a1 100644
--- a/.github/workflows/ci-pkg-install.yml
+++ b/.github/workflows/ci-pkg-install.yml
@@ -46,7 +46,7 @@ jobs:
         pkg-name: ["fabric", "pytorch", "lightning", "notset"]
         python-version: ["3.9", "3.11"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/ci-tests-fabric.yml b/.github/workflows/ci-tests-fabric.yml
index c8b6d1e71a910..ed2301d878a10 100644
--- a/.github/workflows/ci-tests-fabric.yml
+++ b/.github/workflows/ci-tests-fabric.yml
@@ -81,7 +81,7 @@ jobs:
       # TODO: Remove this - Enable running MPS tests on this platform
       DISABLE_MPS: ${{ matrix.os == 'macOS-14' && '1' || '0' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
diff --git a/.github/workflows/ci-tests-pytorch.yml b/.github/workflows/ci-tests-pytorch.yml
index 72a966812397e..cc6e9403964f4 100644
--- a/.github/workflows/ci-tests-pytorch.yml
+++ b/.github/workflows/ci-tests-pytorch.yml
@@ -86,7 +86,7 @@ jobs:
       # TODO: Remove this - Enable running MPS tests on this platform
       DISABLE_MPS: ${{ matrix.os == 'macOS-14' && '1' || '0' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
diff --git a/.github/workflows/cleanup-caches.yml b/.github/workflows/cleanup-caches.yml
index 93bce48fcc43f..d9ddd90ad1cce 100644
--- a/.github/workflows/cleanup-caches.yml
+++ b/.github/workflows/cleanup-caches.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Cleanup
         run: |
diff --git a/.github/workflows/code-checks.yml b/.github/workflows/code-checks.yml
index 527b605e12366..79707977ffc3f 100644
--- a/.github/workflows/code-checks.yml
+++ b/.github/workflows/code-checks.yml
@@ -28,7 +28,7 @@ jobs:
   mypy:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index ed9aa55a2f515..7b73bc7b0015a 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -52,7 +52,7 @@ jobs:
           - { python_version: "3.12", pytorch_version: "2.7", cuda_version: "12.6.3" }
           - { python_version: "3.12", pytorch_version: "2.8", cuda_version: "12.6.3", latest: "true" }
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: docker/setup-buildx-action@v3
@@ -112,7 +112,7 @@ jobs:
           - { python_version: "3.12", pytorch_version: "2.7.1", cuda_version: "12.6.3" }
           - { python_version: "3.12", pytorch_version: "2.8.0", cuda_version: "12.6.3" }
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v3
         if: env.PUSH_NIGHTLY == 'true' && github.repository_owner == 'Lightning-AI'
@@ -154,7 +154,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Build Conda Docker
         # publish master/release
         continue-on-error: true
diff --git a/.github/workflows/docs-build.yml b/.github/workflows/docs-build.yml
index 8f6deeb189773..69d35e605db5b 100644
--- a/.github/workflows/docs-build.yml
+++ b/.github/workflows/docs-build.yml
@@ -64,7 +64,7 @@ jobs:
       PIN_RELEASE_VERSIONS: 1
       ARTIFACT_DAYS: 0
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ref: ${{ inputs.checkout }}
           # only Pytorch has/uses notebooks
diff --git a/.github/workflows/docs-tutorials.yml b/.github/workflows/docs-tutorials.yml
index e6e1f755484fd..8f2fded0b99b9 100644
--- a/.github/workflows/docs-tutorials.yml
+++ b/.github/workflows/docs-tutorials.yml
@@ -18,7 +18,7 @@ jobs:
   docs-update:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
           fetch-depth: 0
diff --git a/.github/workflows/labeler-issue.yml b/.github/workflows/labeler-issue.yml
index 00905bdadd656..afcd2737512a2 100644
--- a/.github/workflows/labeler-issue.yml
+++ b/.github/workflows/labeler-issue.yml
@@ -19,7 +19,7 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Parse issue form
         uses: stefanbuck/github-issue-parser@v3
diff --git a/.github/workflows/release-nightly.yml b/.github/workflows/release-nightly.yml
index 24d1a07f9abbc..3dfc4872fcf15 100644
--- a/.github/workflows/release-nightly.yml
+++ b/.github/workflows/release-nightly.yml
@@ -23,7 +23,7 @@ jobs:
     env:
       PKG_NAME: "lightning"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: 3.9
@@ -53,7 +53,7 @@ jobs:
     env:
       PKG_NAME: "lightning"
     steps:
-      - uses: actions/checkout@v4 # needed to use local composite action
+      - uses: actions/checkout@v5 # needed to use local composite action
       - uses: actions/download-artifact@v5
         with:
           name: nightly-packages-${{ github.sha }}
diff --git a/.github/workflows/release-pkg.yml b/.github/workflows/release-pkg.yml
index fa2a499f4abe2..f50adbc8fbac8 100644
--- a/.github/workflows/release-pkg.yml
+++ b/.github/workflows/release-pkg.yml
@@ -37,7 +37,7 @@ jobs:
     needs: build-packages
     if: github.event_name == 'release'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/download-artifact@v5
         with:
           name: dist-packages-${{ github.sha }}
@@ -54,7 +54,7 @@ jobs:
     outputs:
       tag: ${{ steps.lai-package.outputs.version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ env.PYTHON_VER }}
@@ -74,7 +74,7 @@ jobs:
       TAG: ${{ needs.release-version.outputs.tag }}
       BRANCH_NAME: "trigger/lightning-${{ needs.release-version.outputs.tag }}"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           repository: gridai/base-images
           token: ${{ secrets.PAT_GHOST }}
@@ -139,7 +139,7 @@ jobs:
       matrix:
         name: ["FABRIC", "PYTORCH", "LIGHTNING"]
     steps:
-      - uses: actions/checkout@v4 # needed for local action below
+      - uses: actions/checkout@v5 # needed for local action below
       - uses: actions/download-artifact@v5
         with:
           name: dist-packages-${{ github.sha }}
@@ -164,7 +164,7 @@ jobs:
       matrix:
         name: ["FABRIC", "PYTORCH", "LIGHTNING"]
     steps:
-      - uses: actions/checkout@v4 # needed for local action below
+      - uses: actions/checkout@v5 # needed for local action below
       - uses: actions/download-artifact@v5
         with:
           name: dist-packages-${{ github.sha }}