diff --git a/docs/SETTINGS.md b/docs/SETTINGS.md
index 2cc42e1..d651fc6 100644
--- a/docs/SETTINGS.md
+++ b/docs/SETTINGS.md
@@ -27,3 +27,6 @@ Here are the descriptions of values available to use in the `settings` table:
 | AWS_SES_SECRET | | Amazon Web Services - Simple Email Service - access secret |
 | AWS_SES_EMAIL_FROM | | Amazon Web Services - Simple Email Service - email from field |
 | EMAIL_MAX_TXS | | maximum number of transactions to include in the email body |
+| FUNCTION_LNDHUB | DISABLE | system level switch for using LNDHUB in place of LND |
+| LNDHUB_URL | | URL for the LNDHUB service |
+| FUNCTION_INTERNAL_API | | system level switch for activating the internal API |