diff --git a/.github/workflows/Downstream.yml b/.github/workflows/Downstream.yml
index 5cf065dda7..be511a9f60 100644
--- a/.github/workflows/Downstream.yml
+++ b/.github/workflows/Downstream.yml
@@ -30,14 +30,14 @@ jobs:
           - {user: SciML, repo: OperatorLearning.jl, group: All}
     if: contains(github.event.pull_request.labels.*.name, 'run downstream test')
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - 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@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           repository: ${{ matrix.package.user }}/${{ matrix.package.repo }}
           path: downstream
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3a7762d038..487fec60aa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
             version: '1'
             arch: x64
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
@@ -65,7 +65,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'
diff --git a/.github/workflows/clean_preview.yml b/.github/workflows/clean_preview.yml
index 2b370533ac..834ad2cbfc 100644
--- a/.github/workflows/clean_preview.yml
+++ b/.github/workflows/clean_preview.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           ref: gh-pages
       - name: Delete preview and history + push changes
diff --git a/.github/workflows/fluxbot.yml b/.github/workflows/fluxbot.yml
index 812a39afe9..efb13e4f6d 100644
--- a/.github/workflows/fluxbot.yml
+++ b/.github/workflows/fluxbot.yml
@@ -14,7 +14,7 @@ jobs:
         julia-arch: [x86]
         os: [ubuntu-latest]
     steps:
-      - uses: actions/checkout@v3.6.0 # v1.0.0
+      - uses: actions/checkout@v4.0.0 # v1.0.0
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
diff --git a/.github/workflows/nightly-ci.yml b/.github/workflows/nightly-ci.yml
index e54ee61b1d..dc4a739757 100644
--- a/.github/workflows/nightly-ci.yml
+++ b/.github/workflows/nightly-ci.yml
@@ -20,7 +20,7 @@ jobs:
         os: [ubuntu-latest]
         arch: [x64]
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}