diff --git a/pathways/lcia.py b/pathways/lcia.py
index c0bb586..aa97a47 100644
--- a/pathways/lcia.py
+++ b/pathways/lcia.py
@@ -68,5 +68,4 @@ def fill_characterization_factors_matrix(biosphere_flows: list, methods) -> np.n
             except KeyError:
                 continue
 
-
     return cf_matrix