diff --git a/src/nemosis/defaults.py b/src/nemosis/defaults.py
index 8d3c16f..dbcc4fd 100644
--- a/src/nemosis/defaults.py
+++ b/src/nemosis/defaults.py
@@ -1,5 +1,5 @@
 names = {
-    "FCAS Providers": "NEM Registration and Exemption List.xls",
+    "FCAS Providers": "NEM Registration and Exemption List.xlsx",
     "DISPATCHLOAD": "PUBLIC_DVD_DISPATCHLOAD",
     "NEXT_DAY_DISPATCHLOAD": "PUBLIC_NEXT_DAY_DISPATCHLOAD",
     "DUDETAILSUMMARY": "PUBLIC_DVD_DUDETAILSUMMARY",
@@ -20,7 +20,7 @@
     "FCAS_4_SECOND": "FCAS",
     "ELEMENTS_FCAS_4_SECOND": "Elements_FCAS.csv",
     "VARIABLES_FCAS_4_SECOND": "Ancillary Services Market Causer Pays Variables File.csv",
-    "Generators and Scheduled Loads": "NEM Registration and Exemption List.xls",
+    "Generators and Scheduled Loads": "NEM Registration and Exemption List.xlsx",
     "MNSP_INTERCONNECTOR": "PUBLIC_DVD_MNSP_INTERCONNECTOR",
     "MNSP_PEROFFER": "PUBLIC_DVD_MNSP_PEROFFER",
     "INTERCONNECTOR": "PUBLIC_DVD_INTERCONNECTOR",
@@ -131,8 +131,8 @@
 static_table_url = {
     "ELEMENTS_FCAS_4_SECOND": "https://www.nemweb.com.au/Reports/Current/Causer_Pays_Elements/",
     "VARIABLES_FCAS_4_SECOND": "https://aemo.com.au/-/media/files/electricity/nem/settlements_and_payments/settlements/auction-reports/archive/ancillary-services-market-causer-pays-variables-file.csv",
-    "Generators and Scheduled Loads": "https://www.aemo.com.au/-/media/Files/Electricity/NEM/Participant_Information/NEM-Registration-and-Exemption-List.xls",
-    "_downloader.download_xl": "https://www.aemo.com.au/-/media/Files/Electricity/NEM/Participant_Information/NEM-Registration-and-Exemption-List.xls",
+    "Generators and Scheduled Loads": "https://www.aemo.com.au/-/media/Files/Electricity/NEM/Participant_Information/NEM-Registration-and-Exemption-List.xlsx",
+    "_downloader.download_xl": "https://www.aemo.com.au/-/media/Files/Electricity/NEM/Participant_Information/NEM-Registration-and-Exemption-List.xlsx",
 }
 
 aemo_mms_url = "http://www.nemweb.com.au/Data_Archive/Wholesale_Electricity/MMSDM/{}/MMSDM_{}_{}/MMSDM_Historical_Data_SQLLoader/DATA/{}.zip"