diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 337c99875..c502d3da2 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -34,7 +34,7 @@ jobs:
           - os: windows-latest
             arch: x86
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
@@ -61,7 +61,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1.6'
diff --git a/.github/workflows/IntegrationTest.yml b/.github/workflows/IntegrationTest.yml
index 586a8f070..96b8c4315 100644
--- a/.github/workflows/IntegrationTest.yml
+++ b/.github/workflows/IntegrationTest.yml
@@ -40,14 +40,14 @@ jobs:
             package: {user: JuliaDiff, repo: Diffractor.jl}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
           arch: x64
       - uses: julia-actions/julia-buildpkg@latest
       - name: Clone Downstream
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ matrix.package.user }}/${{ matrix.package.repo }}
           path: downstream
diff --git a/.github/workflows/Invalidations.yml b/.github/workflows/Invalidations.yml
index 4d0004e83..28b9ce2fa 100644
--- a/.github/workflows/Invalidations.yml
+++ b/.github/workflows/Invalidations.yml
@@ -19,12 +19,12 @@ jobs:
     - uses: julia-actions/setup-julia@v1
       with:
         version: '1'
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: julia-actions/julia-buildpkg@v1
     - uses: julia-actions/julia-invalidations@v1
       id: invs_pr
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.repository.default_branch }}
     - uses: julia-actions/julia-buildpkg@v1
diff --git a/.github/workflows/JuliaNightly.yml b/.github/workflows/JuliaNightly.yml
index 55b5fba07..1704f1156 100644
--- a/.github/workflows/JuliaNightly.yml
+++ b/.github/workflows/JuliaNightly.yml
@@ -17,7 +17,7 @@ jobs:
     name: Julia Nightly - Ubuntu - x64
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: nightly
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index f6f268c0e..f80377a24 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -13,7 +13,7 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: 1