diff --git a/.github/workflows/badges.yml b/.github/workflows/badges.yml
index ed6a298..5c2c2cd 100644
--- a/.github/workflows/badges.yml
+++ b/.github/workflows/badges.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up the Java JDK
         uses: actions/setup-java@v3
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index c494338..e37e1e6 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,7 +39,7 @@ 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/format.yml b/.github/workflows/format.yml
index abd1299..d343b73 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -13,7 +13,7 @@ jobs:
   formatting:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3 # v2 minimum required
+      - uses: actions/checkout@v4 # v2 minimum required
         with:
           ref: ${{ github.event.pull_request.head.ref }}
       - uses: axel-op/googlejavaformat-action@v3
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e50cfdb..d22c63b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,7 +6,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - id: install-secret-key
         name: Install gpg secret key
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 561c0ff..651ad1e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
       max-parallel: 4
     name: Test JDK ${{ matrix.java-version }}, ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v3
         with: