diff --git a/.github/workflows/tox_ci.yml b/.github/workflows/tox_ci.yml
index a18c9f8..50a1120 100644
--- a/.github/workflows/tox_ci.yml
+++ b/.github/workflows/tox_ci.yml
@@ -7,7 +7,7 @@ jobs:
   black:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Run black
         uses: actions/setup-python@v4
         with:
@@ -23,7 +23,7 @@ jobs:
       matrix:
         python: ['3.8', '3.9', '3.10']
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup Python
         uses: actions/setup-python@v4
         with: