diff --git a/installinstallmacos.py b/installinstallmacos.py
index 0983905..8888068 100755
--- a/installinstallmacos.py
+++ b/installinstallmacos.py
@@ -51,9 +51,11 @@ DEFAULT_SUCATALOGS = {
     '18': 'https://swscan.apple.com/content/catalogs/others/'
           'index-10.14-10.13-10.12-10.11-10.10-10.9'
           '-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog',
+    '19': 'https://swscan.apple.com/content/catalogs/others/'
+          'index-10.15-10.14-10.13-10.12-10.11-10.10-10.9'
+          '-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog',
 }
 
-
 SEED_CATALOGS_PLIST = (
     '/System/Library/PrivateFrameworks/Seeding.framework/Versions/Current/'
     'Resources/SeedCatalogs.plist'