diff --git a/capella2polarion/__main__.py b/capella2polarion/__main__.py
index b5174d8..e781feb 100644
--- a/capella2polarion/__main__.py
+++ b/capella2polarion/__main__.py
@@ -58,10 +58,10 @@ def cli(
     polarion_url: str,
     polarion_pat: str,
     polarion_delete_work_items: bool,
-    capella_model: capellambse.MelodyModel,
+    capella_model: capellambse.MelodyModel | None,
 ) -> None:
     """Synchronise data from Capella to Polarion."""
-    if capella_model.diagram_cache is None:
+    if capella_model is not None and capella_model.diagram_cache is None:
         logger.warning("It's highly recommended to define a diagram cache!")
 
     capella2polarion_cli = Capella2PolarionCli(
@@ -128,6 +128,7 @@ def synchronize(
     )
     capella_to_polarion_cli.force_update = force_update
 
+    assert capella_to_polarion_cli.capella_model is not None
     converter = model_converter.ModelConverter(
         capella_to_polarion_cli.capella_model,
         capella_to_polarion_cli.polarion_params.project_id,
@@ -199,6 +200,7 @@ def render_documents(
         configs.iterate_documents()
     )
 
+    assert capella_to_polarion_cli.capella_model is not None
     renderer = document_renderer.DocumentRenderer(
         polarion_worker.polarion_data_repo,
         capella_to_polarion_cli.capella_model,
diff --git a/capella2polarion/cli.py b/capella2polarion/cli.py
index 1628445..a972896 100644
--- a/capella2polarion/cli.py
+++ b/capella2polarion/cli.py
@@ -26,7 +26,7 @@ def __init__(
         polarion_url: str,
         polarion_pat: str,
         polarion_delete_work_items: bool,
-        capella_model: capellambse.MelodyModel,
+        capella_model: capellambse.MelodyModel | None,
         force_update: bool = False,
     ) -> None:
         self.debug = debug
diff --git a/ci-templates/gitlab/render_documents.yaml b/ci-templates/gitlab/render_documents.yaml
index e6156b6..1f03b54 100644
--- a/ci-templates/gitlab/render_documents.yaml
+++ b/ci-templates/gitlab/render_documents.yaml
@@ -21,4 +21,4 @@ capella2polarion_render_documents:
 
   script:
     - pip install "capella2polarion${CAPELLA2POLARION_VERSION:+==$CAPELLA2POLARION_VERSION}"
-    - python -m capella2polarion render-documents
+    - capella2polarion render-documents
diff --git a/ci-templates/gitlab/synchronise_elements.yml b/ci-templates/gitlab/synchronise_elements.yml
index 72fd944..674d33f 100644
--- a/ci-templates/gitlab/synchronise_elements.yml
+++ b/ci-templates/gitlab/synchronise_elements.yml
@@ -21,4 +21,4 @@ capella2polarion_synchronise_elements:
 
   script:
     - pip install "capella2polarion${CAPELLA2POLARION_VERSION:+==$CAPELLA2POLARION_VERSION}"
-    - python -m capella2polarion synchronize
+    - capella2polarion synchronize
diff --git a/pyproject.toml b/pyproject.toml
index 3890852..42cac83 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,6 +60,9 @@ test = [
   "pytest-cov",
 ]
 
+[project.scripts]
+capella2polarion = "capella2polarion.__main__:cli"
+
 [tool.black]
 line-length = 79
 target-version = ["py312"]