diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a1b49f9..a1cef7e 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -26,7 +26,7 @@ jobs:
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
@@ -51,7 +51,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'
diff --git a/.github/workflows/FormatPR.yml b/.github/workflows/FormatPR.yml
index cbf3b18..2a3051d 100644
--- a/.github/workflows/FormatPR.yml
+++ b/.github/workflows/FormatPR.yml
@@ -7,7 +7,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install JuliaFormatter and format
         run: |
           julia -e 'import Pkg; Pkg.add("JuliaFormatter")'