diff --git a/.github/workflows/R-CMD-check-wsl.yaml b/.github/workflows/R-CMD-check-wsl.yaml
index 8419dbd6d..4e2241f2d 100644
--- a/.github/workflows/R-CMD-check-wsl.yaml
+++ b/.github/workflows/R-CMD-check-wsl.yaml
@@ -35,7 +35,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
         if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/master'"
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-r@v2.6.4
         with:
diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 5d5719920..f5e0f438f 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -48,7 +48,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
         if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/master'"
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install system dependencies
         if: runner.os == 'Linux'
diff --git a/.github/workflows/Test-coverage.yaml b/.github/workflows/Test-coverage.yaml
index dda0c325b..fcbbecd1e 100644
--- a/.github/workflows/Test-coverage.yaml
+++ b/.github/workflows/Test-coverage.yaml
@@ -32,7 +32,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           workflow: Test-coverage.yml
         if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/master'"
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-r@v2.6.4
       - uses: r-lib/actions/setup-pandoc@v2.6.4
@@ -83,7 +83,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       NOT_CRAN: true
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-r@v2.6.4
         with:
diff --git a/.github/workflows/cmdstan-tarball-check.yaml b/.github/workflows/cmdstan-tarball-check.yaml
index 82c261ca4..bdcbc0f65 100644
--- a/.github/workflows/cmdstan-tarball-check.yaml
+++ b/.github/workflows/cmdstan-tarball-check.yaml
@@ -32,7 +32,7 @@ jobs:
       NOT_CRAN: true
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install system dependencies
         if: runner.os == 'Linux'
         run: |