diff --git a/crawler/data_access.py b/crawler/data_access.py
index a99e6f1..2e6fa54 100644
--- a/crawler/data_access.py
+++ b/crawler/data_access.py
@@ -110,7 +110,8 @@ class Listing:
 
         # some places list pw in price and others pcm
         price = max(
-            self._listing_object["price"], self._listing_object.get("monthlyRent", 0)
+            self._listing_object["price"],
+            self._listing_object.get("monthlyRent", 0) or 0,
         )
         self.append_price_history(price)