diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index a6a6acb..f14d36a 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -16,7 +16,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: test
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python 3.9
       uses: actions/setup-python@v4
       with: