diff --git a/src/seismic_hazard_forecasting.py b/src/seismic_hazard_forecasting.py
index 788c8df..63da460 100644
--- a/src/seismic_hazard_forecasting.py
+++ b/src/seismic_hazard_forecasting.py
@@ -451,7 +451,7 @@ verbose: {verbose}")
                 imls = [dask.delayed(compute_IMT_exceedance)(rx_lat[i], rx_lon[i], distances[i].flatten(), fr, p, lambdas,
                                                             forecast_len, lambdas_perc, m_range, m_pdf, m_cdf, model,
                                                             log_level=logging.DEBUG, imt=imt, IMT_min=0.0, IMT_max=2.0, rx_label=i,
-                                                            rtol=0.1,rx_label=i) for i in iter]
+                                                            rtol=0.1, use_cython=False) for i in iter]
                 iml = dask.compute(*imls)
                 iml_grid_raw.append(list(iml))