diff --git a/README.md b/README.md
index 35a8700..6410667 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Build an image from Dockerfile
         run: docker build -t docker.io/my-organization/my-app:${{ github.sha }} .
       - name: Run Trivy vulnerability scanner
@@ -342,7 +342,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@0.28.0
@@ -371,7 +371,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@0.28.0