diff --git a/models/dune-composites/server.py b/models/dune-composites/server.py
index 6733b5a..926ea46 100644
--- a/models/dune-composites/server.py
+++ b/models/dune-composites/server.py
@@ -41,5 +41,7 @@ def __call__(self, parameters, config):
     def supports_evaluate(self):
         return True
 
-model = DuneCompModel()
+
+if __name__ == "__main__":
+    umbridge.serve_models([DuneCompModel()], 4242)