diff --git a/erpnext_germany/constants.py b/erpnext_germany/constants.py
index 9ef9be4..aedae57 100644
--- a/erpnext_germany/constants.py
+++ b/erpnext_germany/constants.py
@@ -1,6 +1,7 @@
 # German company register courts
 REGISTER_COURTS = [
 	"",  # empty string to be able to select nothing
+	"Aachen",
 	"Altenburg",
 	"Amberg",
 	"Ansbach",