diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d5f7d1c..a9b8702 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: bootstrap
         run: |
           dist/ubuntu/bootstrap.sh
@@ -29,7 +29,7 @@ jobs:
     runs-on: macos-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: bootstrap
         run: |
           dist/macos/bootstrap.sh
@@ -40,7 +40,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: build
         run: dist\win32\build.cmd