diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index 1909106..590e4ca 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -6,7 +6,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index d1d93d6..6e3d051 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # check-out this repository
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Setup python
       - name: Set up Python
         uses: actions/setup-python@v4