diff --git a/.github/workflows/test_pypi.yml b/.github/workflows/test_pypi.yml
new file mode 100644
index 0000000..09cabe1
--- /dev/null
+++ b/.github/workflows/test_pypi.yml
@@ -0,0 +1,48 @@
+name: Publish to TestPyPI
+
+on:
+  workflow_run:
+    workflows: [CI]
+    types:
+      - completed
+env:
+  # Increase this to manually reset the conda environment cache
+  YARDL_VERSION: 0.6.2
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'  # Adjust Python version as needed
+
+      - name: Install required packages
+        run: |
+          pip install setuptools wheel twine build
+
+      - name: Install yardl
+        run: |
+          YARDL_DIR=${{github.workspace}}/yardl
+          mkdir ${YARDL_DIR}
+          cd ${YARDL_DIR}
+          echo "${{github.workspace}}/yardl" >> $GITHUB_PATH
+          wget --quiet "https://github.com/microsoft/yardl/releases/download/v${YARDL_VERSION}/yardl_${YARDL_VERSION}_linux_x86_64.tar.gz"
+          tar -xzf "yardl_${YARDL_VERSION}_linux_x86_64.tar.gz"
+          rm "yardl_${YARDL_VERSION}_linux_x86_64.tar.gz"
+
+      - name: Run yardl
+        run: |
+          cd model
+          yardl generate
+
+      - name: Publish to TestPyPI
+        run: |
+          cd python
+          python -m build
+          twine upload --repository-url https://test.pypi.org/legacy/ dist/* -u __token__ -p ${{ secrets.TEST_PYPI_TOKEN }}
\ No newline at end of file
diff --git a/python/pyproject.toml b/python/pyproject.toml
new file mode 100644
index 0000000..e3db3bd
--- /dev/null
+++ b/python/pyproject.toml
@@ -0,0 +1,20 @@
+[build-system]
+requires = ["setuptools>=42", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "petsird"
+version = "0.0.1"  # Update as needed
+description = "Library and tools for working with PET Emission Tomography Standardization Initiative Raw Data (PETSIRD) data"
+readme = "README.md"
+authors = [{ name = "Kris Thielemans", email = "k.thielemans@ucl.ac.uk" }]
+license = { text = "Apache-2.0" }
+requires-python = ">=3.9"
+dependencies = [
+    "numpy>=1.22",
+]
+
+[project.urls]
+Homepage = "https://etsinitiative.org/"
+Repository = "https://github.com/ETSInitiative/PETSIRD.git"
+Issues = "https://github.com/ETSInitiative/PETSIRD/issues"