diff --git a/Metallicity_Stack_Commons/column_names.py b/Metallicity_Stack_Commons/column_names.py
index 66a6b3f..afcbfa7 100644
--- a/Metallicity_Stack_Commons/column_names.py
+++ b/Metallicity_Stack_Commons/column_names.py
@@ -79,8 +79,9 @@ def line_fit_suffix_add(line_name0, line_type0):
 npz_filename_dict['flux_pdf'] = 'flux_pdf.npz'
 npz_filename_dict['flux_errors'] = 'flux_errors.npz'
 npz_filename_dict['flux_peak'] = 'flux_peak.npz'
-npz_filename_dict['metal_errors'] = 'metal_errors.npz'
-npz_filename_dict['metal_peak'] = 'metal_peak.npz'
+npz_filename_dict['der_prop_pdf'] = 'derived_properties_pdf.npz'
+npz_filename_dict['der_prop_errors'] = 'derived_properties_errors.npz'
+npz_filename_dict['der_prop_peak'] = 'derived_properties_peak.npz'
 
 
 def merge_column_names(*args):