diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 0758e394..29052a24 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -20,7 +20,7 @@ jobs:
       BENCHMARK: true
     steps:
     - name: Checkout Jekyll
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 34458c90..2f316a50 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
             ruby_version: "jruby-9.4.0.0"
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: "Set up ${{ matrix.label }}"
         uses: ruby/setup-ruby@v1
         with:
@@ -60,7 +60,7 @@ jobs:
             ruby_version: "2.7"
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: "Set up Ruby ${{ matrix.ruby_version }}"
         uses: ruby/setup-ruby@v1
         with:
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 0502bb14..8687ac80 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -29,7 +29,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index a24fffd0..d02f98fd 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -17,7 +17,7 @@ jobs:
       BUNDLE_JOBS: 4
       BUNDLE_RETRY: 3
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ env.RUBY_VERSION }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3585815a..9780687e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
           - 2.7
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: "Set up Ruby ${{ matrix.ruby_version }}"
         uses: ruby/setup-ruby@v1
         with:
diff --git a/.github/workflows/third-party.yml b/.github/workflows/third-party.yml
index 288f24df..f50864c9 100644
--- a/.github/workflows/third-party.yml
+++ b/.github/workflows/third-party.yml
@@ -18,12 +18,12 @@ jobs:
       BUNDLE_RETRY: 3
     steps:
     - name: Checkout Jekyll
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 5
         path: jekyll
     - name: Checkout Third-Party Repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         repository: ashmaroli/tomjoht.github.io
         path: sandbox