diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index afa8938..35294cc 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       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/generatepdf.yml b/.github/workflows/generatepdf.yml
index 4a9e429..a956e67 100644
--- a/.github/workflows/generatepdf.yml
+++ b/.github/workflows/generatepdf.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Generate pdf
       run: |
diff --git a/.github/workflows/generatepdfapplicazioni.yml b/.github/workflows/generatepdfapplicazioni.yml
index d8e1899..5dab267 100644
--- a/.github/workflows/generatepdfapplicazioni.yml
+++ b/.github/workflows/generatepdfapplicazioni.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: generate pdf
       run: |
diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index 227823c..0ab3388 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: HTML5 Validator
       # You may pin to the exact commit or the version.