diff --git a/.github/workflows/code_quality_control.yml b/.github/workflows/code_quality_control.yml
index 3fb4eb8..4995f92 100644
--- a/.github/workflows/code_quality_control.yml
+++ b/.github/workflows/code_quality_control.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/cos_integration.yml b/.github/workflows/cos_integration.yml
index f98e956..c826e62 100644
--- a/.github/workflows/cos_integration.yml
+++ b/.github/workflows/cos_integration.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index e2e3e49..7fb194d 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,7 +10,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
           python-version: 3.x
diff --git a/.github/workflows/docs_test.yml b/.github/workflows/docs_test.yml
index 9bb0766..1820a0a 100644
--- a/.github/workflows/docs_test.yml
+++ b/.github/workflows/docs_test.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/lints.yml b/.github/workflows/lints.yml
index 8cbb55a..9dbb11f 100644
--- a/.github/workflows/lints.yml
+++ b/.github/workflows/lints.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/pr_request_checks.yml b/.github/workflows/pr_request_checks.yml
index 19c89aa..b8078b1 100644
--- a/.github/workflows/pr_request_checks.yml
+++ b/.github/workflows/pr_request_checks.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 3a417da..ee6f5da 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v5