diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 73f3c4f..569b303 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -6,7 +6,7 @@ jobs:
   PEP8:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Set up Python
         uses: actions/setup-python@v4.7.0
         with:
@@ -22,7 +22,7 @@ jobs:
   PyLint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Set up Python
         uses: actions/setup-python@v4.7.0
         with:
@@ -42,7 +42,7 @@ jobs:
   MyPy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Set up Python
         uses: actions/setup-python@v4.7.0
         with:
@@ -62,7 +62,7 @@ jobs:
   Black:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Set up Python
         uses: actions/setup-python@v4.7.0
         with:
@@ -85,7 +85,7 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4.7.0
         with:
@@ -108,7 +108,7 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - name: Set up Python
         uses: actions/setup-python@v4.7.0
         with: