diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c937a2c..912f0e8 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -17,7 +17,7 @@ jobs:
       matrix:
         os: [windows-latest, windows-2019]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Build on ${{ matrix.os }} with vs-2019
         run: |
           .\scripts\win_build.bat
@@ -34,7 +34,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
         compiler: [ gcc, clang ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Build on ${{ matrix.os }} with ${{ matrix.compiler }}
         run: |
           echo "CC = $CC, CXX = $CXX"