diff --git a/openstreetmap-tiles-update-expire b/openstreetmap-tiles-update-expire
index eafd7d2..e752850 100755
--- a/openstreetmap-tiles-update-expire
+++ b/openstreetmap-tiles-update-expire
@@ -59,6 +59,10 @@ EXPIRY_TOUCHFROM=13
 EXPIRY_DELETEFROM=19
 EXPIRY_MAXZOOM=20
 
+
+REPLICATION_URL=${REPLICATION_URL:="https://planet.openstreetmap.org/replication/hour/"}
+MAX_INTERVAL_SECONDS=${MAX_INTERVAL_SECONDS:="3600"}
+
 #*************************************************************************
 #*************************************************************************