diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cffcdee..1624b49 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
         - ubuntu-latest
         python-version: ['3.8', '3.11']
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: setup python
       uses: actions/setup-python@v2
       with:
diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
index 17eb5fd..03a7100 100644
--- a/.github/workflows/pypi-publish.yml
+++ b/.github/workflows/pypi-publish.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: setup python
         uses: actions/setup-python@v2
         with: