diff --git a/_osm/Mapnik.zmp/params.txt b/_osm/Mapnik.zmp/params.txt
index f5b6ae2b4..b322a6988 100644
--- a/_osm/Mapnik.zmp/params.txt
+++ b/_osm/Mapnik.zmp/params.txt
@@ -8,7 +8,7 @@ ParentSubMenu=City
 Name=OSM OpenStreetMap.org - MAPNIK
 NameInCache=osmmapMapnik
 DefURLBase=https://tile.openstreetmap.org/{z}/{x}/{y}.png
-RequestHead=Accept-Language: en-US\r\nReferer: https://www.openstreetmap.org/
+RequestHead=Accept: image/avif,image/webp,*/*\r\nAccept-Language: en-US\r\nReferer: https://www.openstreetmap.org/
 ContentType=image/png
 Ext=.png
 projection=1