diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 346383e..420781e 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -15,7 +15,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup node 20
         uses: actions/setup-node@v3
@@ -32,7 +32,7 @@ jobs:
   format-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup node 20
         uses: actions/setup-node@v3
@@ -46,7 +46,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup node 20
         uses: actions/setup-node@v3
@@ -65,7 +65,7 @@ jobs:
         os: [ ubuntu-20.04, ubuntu-22.04, macos-11, macos-12, macos-13, windows-2019, windows-2022 ]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup node 20
         uses: actions/setup-node@v3
@@ -90,7 +90,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup node 20
         uses: actions/setup-node@v3
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index da4c63e..810ee7c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -31,7 +31,7 @@ jobs:
       
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/run.yml b/.github/workflows/run.yml
index 58e4add..d329c5b 100644
--- a/.github/workflows/run.yml
+++ b/.github/workflows/run.yml
@@ -27,11 +27,11 @@ jobs:
     if: ${{ false }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: daveol/SampleApplication
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: ./build/
 
diff --git a/README.md b/README.md
index 0aa91dd..65aaa32 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ See [action.yml](action.yml)
 ## Basic
 ```yaml
 steps:
-- uses: actions/checkout@v3
+- uses: actions/checkout@v4
 
 - name: Set up JDK 17
   uses: actions/setup-java@v3