diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 895e18d..6fa0283 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -37,7 +37,7 @@ jobs:
             version: '1'
             arch: x64
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: ${{ matrix.version }}
diff --git a/.github/workflows/format-check.yml b/.github/workflows/format-check.yml
index 77f6793..7dec56c 100644
--- a/.github/workflows/format-check.yml
+++ b/.github/workflows/format-check.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install JuliaFormatter and format
         run: |
           julia -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter"))'