diff --git a/.github/workflows/2023-PyConIT-workflow.yml b/.github/workflows/2023-PyConIT-workflow.yml
index 6d60e55..2d8fa57 100644
--- a/.github/workflows/2023-PyConIT-workflow.yml
+++ b/.github/workflows/2023-PyConIT-workflow.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1
       - uses: actions/setup-python@v4
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v4
@@ -62,7 +62,7 @@ jobs:
     needs: [ lint, test ]
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v4
diff --git a/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yml b/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yml
index 30b9f28..1683e73 100644
--- a/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yml
+++ b/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1
       - uses: actions/setup-python@v4
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v4
@@ -63,7 +63,7 @@ jobs:
     needs: [ lint, test ]
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v4
diff --git a/.github/workflows/2023_EuroSciPy_workflow.yml b/.github/workflows/2023_EuroSciPy_workflow.yml
index 2f14138..e397519 100644
--- a/.github/workflows/2023_EuroSciPy_workflow.yml
+++ b/.github/workflows/2023_EuroSciPy_workflow.yml
@@ -27,7 +27,7 @@ jobs:
         python-version: [ "3.11" ]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 1
           sparse-checkout: 2023_EuroSciPy