diff --git a/.github/workflows/black_manual.yaml b/.github/workflows/black_manual.yaml
new file mode 100644
index 000000000..e3a79df6e
--- /dev/null
+++ b/.github/workflows/black_manual.yaml
@@ -0,0 +1,39 @@
+name: Manual Black formatting
+
+on:
+  workflow_dispatch:  # This allows you to manually trigger the workflow
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  format-code:
+    runs-on: ubuntu-latest
+    if: github.actor == 'montyly' || github.actor == 'smonicas' # only Josselin or Simone can trigger this
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        ref: ${{ github.head_ref }}  # Checkout the branch of the PR
+
+    - name: Set up Python
+      uses: actions/checkout@v4
+      with:
+        python-version: '3.x'
+
+    - name: Install Black
+      run: pip install .[dev]
+
+    - name: Run Black and auto-format code
+      run: black .
+
+    - name: Commit and push changes if formatting occurred
+      run: |
+        git config --local user.email "actions@github.com"
+        git config --local user.name "GitHub Actions"
+        git add .
+        git diff-index --quiet HEAD || git commit -m "Auto format code with Black"
+        git push origin ${{ github.head_ref }}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}