diff --git a/.github/workflows/test_linux_gmt8.yml b/.github/workflows/test_linux_gmt8.yml
index 2a3c474..c13d812 100644
--- a/.github/workflows/test_linux_gmt8.yml
+++ b/.github/workflows/test_linux_gmt8.yml
@@ -19,7 +19,7 @@ jobs:
     name: Test GMT +8 on Ubuntu
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set Timezone to +8 (With input)
         uses: ./
         with:
diff --git a/.github/workflows/test_macos_gmt8.yml b/.github/workflows/test_macos_gmt8.yml
index cc49660..bc89a4e 100644
--- a/.github/workflows/test_macos_gmt8.yml
+++ b/.github/workflows/test_macos_gmt8.yml
@@ -16,7 +16,7 @@ jobs:
     name: Test GMT +8 on MacOS
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set Timezone to +8 (With input)
         uses: ./
         with:
diff --git a/.github/workflows/test_run_action.yml b/.github/workflows/test_run_action.yml
index 7f2258f..dc753c0 100644
--- a/.github/workflows/test_run_action.yml
+++ b/.github/workflows/test_run_action.yml
@@ -19,7 +19,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set Timezone to +0 (No input)
         uses: ./
       - name: Set Timezone to +0 (With input)
diff --git a/.github/workflows/test_windows_gmt8.yml b/.github/workflows/test_windows_gmt8.yml
index b6e18c9..dd2d8d7 100644
--- a/.github/workflows/test_windows_gmt8.yml
+++ b/.github/workflows/test_windows_gmt8.yml
@@ -16,7 +16,7 @@ jobs:
     name: Test GMT +8 on Windows
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set Timezone to +8 (With input)
         uses: ./
         with: