diff --git a/fioul.py b/fioul.py
index 1f892ab..5b52b5d 100755
--- a/fioul.py
+++ b/fioul.py
@@ -20,6 +20,7 @@ def get_today_prices_from_internet():
         pricesZone {
           price
           min_quantity
+          max_quantity
         }
       }
     }
@@ -33,8 +34,14 @@ def get_today_prices_from_internet():
     json_data = json_data["getProducts"][0]
     tax = float(json_data["tax"]["value"])
     zones = json_data["pricesZone"]
-    price_500 = next((x["price"] for x in zones if x["min_quantity"] == 500), None)
-    price_1000 = next((x["price"] for x in zones if x["min_quantity"] == 1000), None)
+    price_500 = next(
+        (x["price"] for x in zones if x["min_quantity"] <= 500 < x["max_quantity"]),
+        None,
+    )
+    price_1000 = next(
+        (x["price"] for x in zones if x["min_quantity"] <= 1000 < x["max_quantity"]),
+        None,
+    )
     # apply tax
     price_500 = price_500 * (100 + tax) / 100.0
     price_1000 = price_1000 * (100 + tax) / 100.0