diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
index 5d45593..a60f0c8 100644
--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
diff --git a/.github/workflows/javadoc.yml b/.github/workflows/javadoc.yml
index 4a027b4..a21d091 100644
--- a/.github/workflows/javadoc.yml
+++ b/.github/workflows/javadoc.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up JDK 25
         uses: actions/setup-java@v4
         with:
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index b8d5484..6df58e4 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up JDK 21
         uses: actions/setup-java@v4
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 6c8bf41..db3d9b6 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -19,7 +19,7 @@ jobs:
         java-version: [ '21' ]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v4
         with:
@@ -45,7 +45,7 @@ jobs:
         java-version: [ '21' ]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v4
         with: