diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 80d07c6..9fbcc11 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -35,7 +35,7 @@ jobs:
           - os: macOS-latest
             arch: x86
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
@@ -54,7 +54,7 @@ jobs:
       contents: write
       statuses: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'
diff --git a/.github/workflows/format_check.yml b/.github/workflows/format_check.yml
index 1015bf6..9fba101 100644
--- a/.github/workflows/format_check.yml
+++ b/.github/workflows/format_check.yml
@@ -22,7 +22,7 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install JuliaFormatter and format
         # The version of JuliaFormatter used is just to show how to specify the version. The latest
         # version would be preferrable.
diff --git a/.github/workflows/format_pr.yml b/.github/workflows/format_pr.yml
index efb4788..275a61e 100644
--- a/.github/workflows/format_pr.yml
+++ b/.github/workflows/format_pr.yml
@@ -16,7 +16,7 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install JuliaFormatter and format
         run: |
           julia  -e 'import Pkg; Pkg.add("JuliaFormatter")'