diff --git a/.github/workflows/benchmark-comment.yml b/.github/workflows/benchmark-comment.yml
index 770fad567..c8ed84388 100644
--- a/.github/workflows/benchmark-comment.yml
+++ b/.github/workflows/benchmark-comment.yml
@@ -24,7 +24,7 @@ jobs:
       ${{ github.event.workflow_run.event == 'pull_request' &&
           github.event.workflow_run.conclusion == 'success' }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       # restore records from the artifacts
       - uses: dawidd6/action-download-artifact@v2
         with:
diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 552b799cc..3f61ee694 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -16,7 +16,7 @@ jobs:
     if: contains(github.event.pull_request.labels.*.name, 'performance critical')
     steps:
       # setup
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1.7'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7e8e4e06f..628e5517d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
           - 'MultiOutput'
           - 'Others'
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
diff --git a/.github/workflows/doc_preview_cleanup.yml b/.github/workflows/doc_preview_cleanup.yml
index bc29462c0..94b9f70ad 100644
--- a/.github/workflows/doc_preview_cleanup.yml
+++ b/.github/workflows/doc_preview_cleanup.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     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/docs.yml b/.github/workflows/docs.yml
index a339654a2..90b31a14a 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -17,7 +17,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 71060d96e..3f39a3fd3 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@v1
         with:
           version: 1