diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 0179b4d..d165df6 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -30,7 +30,7 @@ jobs:
             os: windows-latest
             arch: x64
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
diff --git a/.github/workflows/Docs.yml b/.github/workflows/Docs.yml
index 5e29679..3980359 100644
--- a/.github/workflows/Docs.yml
+++ b/.github/workflows/Docs.yml
@@ -15,7 +15,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'
diff --git a/.github/workflows/DocsPreviewCleanup.yml b/.github/workflows/DocsPreviewCleanup.yml
index 66e9197..40805b3 100644
--- a/.github/workflows/DocsPreviewCleanup.yml
+++ b/.github/workflows/DocsPreviewCleanup.yml
@@ -16,7 +16,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
       - name: Delete preview and history + push changes
diff --git a/.github/workflows/Format.yml b/.github/workflows/Format.yml
index a2adf7e..fc1a7c2 100644
--- a/.github/workflows/Format.yml
+++ b/.github/workflows/Format.yml
@@ -7,7 +7,7 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: 1