diff --git a/osm/grabtiles.py b/osm/grabtiles.py
index 05fced4..13834e4 100644
--- a/osm/grabtiles.py
+++ b/osm/grabtiles.py
@@ -15,7 +15,7 @@ COMBO_MAP_MAX_BOUNDS = {
     "corner2": {"lat": 45.5583, "lng": 5.1574}
 }
 
-for zoom in range(3, 19):
+for zoom in range(3, 20):
     xtile1, ytile1 = deg2num(COMBO_MAP_MAX_BOUNDS['corner1']['lat'],
                              COMBO_MAP_MAX_BOUNDS['corner1']['lng'],
                              zoom)