diff --git a/.github/workflows/asciidoc.yml b/.github/workflows/asciidoc.yml
index bd893171..44ee2722 100644
--- a/.github/workflows/asciidoc.yml
+++ b/.github/workflows/asciidoc.yml
@@ -16,7 +16,7 @@ jobs:
     name: Build AsciiDoc documentation
     steps:
       - name: Checkout into ./repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: repo
       - name: Extract revision info
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index e85e3a70..f6a74bf9 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 9af0e823..12dda4a8 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -20,7 +20,7 @@ jobs:
         java: [11, 13, 15, 17]
     name: Java ${{ matrix.java }} Run
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK ${{ matrix.java }}
       uses: actions/setup-java@v3
       with:
@@ -42,7 +42,7 @@ jobs:
         java: [17]
     name: Java ${{ matrix.java }} Gradle Run
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK ${{ matrix.java }}
       uses: actions/setup-java@v3
       with:
@@ -68,7 +68,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Check Code Style
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK 15
       uses: actions/setup-java@v3
       with:
@@ -88,7 +88,7 @@ jobs:
     runs-on: ubuntu-latest
     name: SonarCloud Java 16
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         # Disabling shallow clone is recommended for improving relevancy of reporting
         fetch-depth: 0
@@ -114,7 +114,7 @@ jobs:
     needs: [code-style, test, test-gradle]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK 11
       uses: actions/setup-java@v3
       with: