diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 0353cbf..378087f 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0 # need to checkout "all commits" for certain features to work (e.g., get all changed files)
 
@@ -107,7 +107,7 @@ jobs:
         with:
           go-version: ^1.16
       - name: Checkout Code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v4.0.0
 
       - name: Load CI Environment from .ci_env
         id: load_ci_env
@@ -132,7 +132,7 @@ jobs:
       DATETIME: ${{ needs.prepare_ci_run.outputs.DATETIME }}
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v4.0.0
 
       - name: Load CI Environment from .ci_env
         id: load_ci_env
diff --git a/.github/workflows/integration-tests.yaml b/.github/workflows/integration-tests.yaml
index 7ac1f9b..a3f96a1 100644
--- a/.github/workflows/integration-tests.yaml
+++ b/.github/workflows/integration-tests.yaml
@@ -37,7 +37,7 @@ jobs:
     steps:
       # Checkout code for the integrations tests in test/e2e
       - name: Check out code.
-        uses: actions/checkout@v3.0.2
+        uses: actions/checkout@v4.0.0
 
       - name: Setup Go
         uses: actions/setup-go@v3.2.0
diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
index 6e55665..5a1f233 100644
--- a/.github/workflows/reviewdog.yml
+++ b/.github/workflows/reviewdog.yml
@@ -11,7 +11,7 @@ jobs:
           go-version: 1.16
         id: go
       - name: Check out code.
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v4.0.0
       - name: Install linters
         run: '( mkdir linters && cd linters && go get golang.org/x/lint/golint )'
       - uses: reviewdog/action-setup@v1.0.3