diff --git a/.github/workflows/FSMD_tester.yml b/.github/workflows/FSMD_tester.yml
index e9c9e00..e731c72 100644
--- a/.github/workflows/FSMD_tester.yml
+++ b/.github/workflows/FSMD_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/comparatori_tester.yml b/.github/workflows/comparatori_tester.yml
index 02d9e75..537e488 100644
--- a/.github/workflows/comparatori_tester.yml
+++ b/.github/workflows/comparatori_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/complete_project_tester.yml b/.github/workflows/complete_project_tester.yml
index 7f42f2f..e01c4b0 100644
--- a/.github/workflows/complete_project_tester.yml
+++ b/.github/workflows/complete_project_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/datapath_tester.yml b/.github/workflows/datapath_tester.yml
index 394e007..b81c8f2 100644
--- a/.github/workflows/datapath_tester.yml
+++ b/.github/workflows/datapath_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/files_equal_tester.yml b/.github/workflows/files_equal_tester.yml
index 670d8ff..6149c07 100644
--- a/.github/workflows/files_equal_tester.yml
+++ b/.github/workflows/files_equal_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check comparatore16
         run: echo "1" && diff sis/comparatore16.blif comparatori/comparatore16.blif
       - name: Check controllore_src.blif
diff --git a/.github/workflows/fsm_optimizer.yml b/.github/workflows/fsm_optimizer.yml
index 4e1b757..481300d 100644
--- a/.github/workflows/fsm_optimizer.yml
+++ b/.github/workflows/fsm_optimizer.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/fsm_tester.yml b/.github/workflows/fsm_tester.yml
index dde1c5c..2b80d19 100644
--- a/.github/workflows/fsm_tester.yml
+++ b/.github/workflows/fsm_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/fsmd_optimizer.yml b/.github/workflows/fsmd_optimizer.yml
index d9dd9e1..3efac72 100644
--- a/.github/workflows/fsmd_optimizer.yml
+++ b/.github/workflows/fsmd_optimizer.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/maggiore_tester.yml b/.github/workflows/maggiore_tester.yml
index 9f7eb5f..2c39d12 100644
--- a/.github/workflows/maggiore_tester.yml
+++ b/.github/workflows/maggiore_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/minoreuguale_tester.yml b/.github/workflows/minoreuguale_tester.yml
index 96e70ac..2aa2a3f 100644
--- a/.github/workflows/minoreuguale_tester.yml
+++ b/.github/workflows/minoreuguale_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/multiplexer_tester.yml b/.github/workflows/multiplexer_tester.yml
index 0395e4f..29fe77c 100644
--- a/.github/workflows/multiplexer_tester.yml
+++ b/.github/workflows/multiplexer_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/porte_logiche_tester.yml b/.github/workflows/porte_logiche_tester.yml
index f681041..617aff5 100644
--- a/.github/workflows/porte_logiche_tester.yml
+++ b/.github/workflows/porte_logiche_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/registri_tester.yml b/.github/workflows/registri_tester.yml
index aa844d6..e4d54c2 100644
--- a/.github/workflows/registri_tester.yml
+++ b/.github/workflows/registri_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/shiftersx_tester.yml b/.github/workflows/shiftersx_tester.yml
index 4155913..51226cb 100644
--- a/.github/workflows/shiftersx_tester.yml
+++ b/.github/workflows/shiftersx_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/sommatori_tester.yml b/.github/workflows/sommatori_tester.yml
index 9424c09..6627b6f 100644
--- a/.github/workflows/sommatori_tester.yml
+++ b/.github/workflows/sommatori_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/sottrattori_tester.yml b/.github/workflows/sottrattori_tester.yml
index 57fee8c..bdca487 100644
--- a/.github/workflows/sottrattori_tester.yml
+++ b/.github/workflows/sottrattori_tester.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with: