diff --git a/.github/workflows/2023-PyConIT-workflow.yaml b/.github/workflows/2023-PyConIT-workflow.yaml
index 2bf5a61..9e16bd1 100644
--- a/.github/workflows/2023-PyConIT-workflow.yaml
+++ b/.github/workflows/2023-PyConIT-workflow.yaml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 1
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
@@ -68,7 +68,7 @@ jobs:
     needs: [ lint, test ]
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
diff --git a/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yaml b/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yaml
index 85c256f..6730ec6 100644
--- a/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yaml
+++ b/.github/workflows/2023-PyData_Berlin-python-pdf-workflow.yaml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 1
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
@@ -68,7 +68,7 @@ jobs:
     needs: [ lint, test ]
     steps:
       - name: Setup Python environment
-        uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 0
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
diff --git a/.github/workflows/2023_EuroSciPy_workflow.yaml b/.github/workflows/2023_EuroSciPy_workflow.yaml
index d2bde63..776080b 100644
--- a/.github/workflows/2023_EuroSciPy_workflow.yaml
+++ b/.github/workflows/2023_EuroSciPy_workflow.yaml
@@ -32,7 +32,7 @@ jobs:
         python-version: [ "3.12" ]
 
     steps:
-      - uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4.0.0
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           fetch-depth: 1
           sparse-checkout: 2023_EuroSciPy