diff --git a/.github/workflows/black-fmt.yml b/.github/workflows/black-fmt.yml
index 3fab389..1ea06e7 100644
--- a/.github/workflows/black-fmt.yml
+++ b/.github/workflows/black-fmt.yml
@@ -7,7 +7,7 @@ jobs:
     name: black formatter
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check files using the black formatter
         uses: rickstaa/action-black@v1
         id: action_black
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 8007703..04503bf 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -12,7 +12,7 @@ jobs:
     name: Python ${{ matrix.python-version }} on ${{ matrix.architecture }} test
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install poetry
         run: pipx install poetry