diff --git a/.github/workflows/code_quality_control.yml b/.github/workflows/code_quality_control.yml
index 112722f..07cc802 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@v4
diff --git a/.github/workflows/cos_integration.yml b/.github/workflows/cos_integration.yml
index 4a20c9d..34213cb 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@v4
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index a7e64a0..0f89cb4 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@v4
         with:
           python-version: 3.x
diff --git a/.github/workflows/docs_test.yml b/.github/workflows/docs_test.yml
index b9d6758..35d2ca9 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@v4
diff --git a/.github/workflows/lints.yml b/.github/workflows/lints.yml
index 241332f..f63a566 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@v4
diff --git a/.github/workflows/pr_request_checks.yml b/.github/workflows/pr_request_checks.yml
index 39bdd82..541115e 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@v4
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 080bcbb..05e7f17 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@v4