diff --git a/.env.example b/.env.example
index bcf9bdc..6f1a51e 100644
--- a/.env.example
+++ b/.env.example
@@ -9,3 +9,5 @@ APNS_BUNDLE_ID=
 APNS_PRIVATE_KEY=
 
 PARKING_LOGGING_INTERVAL_MS=
+PARKING_HISTORICAL_AVERAGE_MINIMUM_INTERVAL=
+PARKING_HISTORICAL_AVERAGE_MAXIMUM_TIMESPAN=