diff --git a/backend/routes/osm.py b/backend/routes/osm.py
index 31d6778..b9433a1 100644
--- a/backend/routes/osm.py
+++ b/backend/routes/osm.py
@@ -29,6 +29,10 @@ _overpass_sem       = asyncio.Semaphore(1)
 _overpass_last_req  = 0.0
 _OVERPASS_MIN_DELAY = 2.0  # Sekunden zwischen Anfragen
 _OVERPASS_UA        = 'BanYaro/1.0 (https://banyaro.app; dog-walking PWA; contact: mail@motocamp.de)'
+_OVERPASS_HEADERS   = {
+    'User-Agent': _OVERPASS_UA,
+    'Referer':    'https://banyaro.app/',  # von overpass-api.de verlangt gegen 406
+}
 
 # Referenzen auf laufende Hintergrund-Tasks — verhindert GC vor Abschluss
 _bg_tasks: set = set()
@@ -86,7 +90,7 @@ async def _fetch_overpass(query):
                         await asyncio.sleep(wait)
                     async with httpx.AsyncClient(
                         timeout=40,
-                        headers={'User-Agent': _OVERPASS_UA},
+                        headers=_OVERPASS_HEADERS,
                     ) as client:
                         r = await client.post(url, data={'data': query})
                     _overpass_last_req = time.monotonic()