diff --git a/.github/workflows/Documenter.yml b/.github/workflows/Documenter.yml
index 85fe7a83a..9236eb46a 100644
--- a/.github/workflows/Documenter.yml
+++ b/.github/workflows/Documenter.yml
@@ -25,7 +25,7 @@ jobs:
   docs-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
diff --git a/.github/workflows/Invalidations.yml b/.github/workflows/Invalidations.yml
index e1b0dd274..f4f28b8c8 100644
--- a/.github/workflows/Invalidations.yml
+++ b/.github/workflows/Invalidations.yml
@@ -23,7 +23,7 @@ jobs:
       with:
         version: '1'
     # current branch
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: add MPIPreferences
       shell: julia --color=yes --project=. {0}
       run: |
@@ -35,7 +35,7 @@ jobs:
       id: invs_pr
 
     # default branch
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         ref: ${{ github.event.repository.default_branch }}
     - name: add MPIPreferences
diff --git a/.github/workflows/PreviewCleanup.yml b/.github/workflows/PreviewCleanup.yml
index 94b9f70ad..7eb81a944 100644
--- a/.github/workflows/PreviewCleanup.yml
+++ b/.github/workflows/PreviewCleanup.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: gh-pages
       - name: Delete preview and history + push changes
diff --git a/.github/workflows/ShellCheck.yml b/.github/workflows/ShellCheck.yml
index 577caf634..240d3b2fe 100644
--- a/.github/workflows/ShellCheck.yml
+++ b/.github/workflows/ShellCheck.yml
@@ -22,7 +22,7 @@ jobs:
   shellcheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Install dependencies
         run: sudo apt install shellcheck
       - name: Check scripts
diff --git a/.github/workflows/UnitTests.yml b/.github/workflows/UnitTests.yml
index 2275362e9..7c64ac7c7 100644
--- a/.github/workflows/UnitTests.yml
+++ b/.github/workflows/UnitTests.yml
@@ -55,7 +55,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - uses: julia-actions/setup-julia@v2
       with:
@@ -109,7 +109,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - uses: julia-actions/setup-julia@v2
       with:
@@ -164,7 +164,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Install MPI via homebrew
       run: |
@@ -218,7 +218,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Install MPI via apt
       run: |
@@ -268,7 +268,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - uses: julia-actions/setup-julia@v2
       with:
@@ -303,7 +303,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Download Microsoft MPI
       run: (new-object net.webclient).DownloadFile("https://download.microsoft.com/download/a/5/2/a5207ca5-1203-491a-8fb8-906fd68ae623/msmpisetup.exe", "msmpisetup.exe")
@@ -367,7 +367,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - uses: julia-actions/setup-julia@v2
       with:
@@ -423,7 +423,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Install MPI via apt
       run: |
@@ -488,7 +488,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set MPITRAMPOLINE_MPIEXEC
       run: echo "MPITRAMPOLINE_MPIEXEC=$(which mpiexec)" >> "${GITHUB_ENV}"
@@ -560,7 +560,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - uses: julia-actions/setup-julia@v2
       with: