diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index f892b0e..6600a35 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -12,7 +12,7 @@ jobs:
         python-version: [ '3.9', '3.10']
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/flake8.yaml b/.github/workflows/flake8.yaml
index be6f63b..b7af0f2 100644
--- a/.github/workflows/flake8.yaml
+++ b/.github/workflows/flake8.yaml
@@ -10,7 +10,7 @@ jobs:
     name: lint
     steps:
       - name: Check out source repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python environment
         uses: actions/setup-python@v4
         with: