diff --git a/config.json b/config.json
index c645126..314c6b4 100644
--- a/config.json
+++ b/config.json
@@ -32,9 +32,9 @@
       // Please ask Freifunk Regensburg before using its tile server c- example with retina tiles
       "url": "https://{s}.tiles.ffrgb.net/{z}/{x}/{y}{retina}.png",
       "config": {
-        "maxZoom": 22,
+        "maxZoom": 20,
         "subdomains": "1234",
-        "attribution": "<a href=\"https://www.mapbox.com/about/maps/\" target=\"_blank\">&copy; Mapbox</a> <a href=\"https://openstreetmap.org/about/\" target=\"_blank\">&copy; OpenStreetMap</a> <a class=\"mapbox-improve-map\" href=\"https://www.mapbox.com/map-feedback/\" target=\"_blank\">Improve this map</a>",
+        "attribution": "<a href=\"http://www.openmaptiles.org/\" target=\"_blank\">&copy; OpenMapTiles</a> <a href=\"http://www.openstreetmap.org/about/\" target=\"_blank\">&copy; OpenStreetMap contributors</a>",
         "start": 6
       }
     },
@@ -43,9 +43,9 @@
       // Please ask Freifunk Regensburg before using its tile server - example with retina and dark tiles
       "url": "https://{s}.tiles.ffrgb.net/n/{z}/{x}/{y}{retina}.png",
       "config": {
-        "maxZoom": 22,
+        "maxZoom": 20,
         "subdomains": "1234",
-        "attribution": "<a href=\"https://www.mapbox.com/about/maps/\" target=\"_blank\">&copy; Mapbox</a> <a href=\"https://openstreetmap.org/about/\" target=\"_blank\">&copy; OpenStreetMap</a> <a class=\"mapbox-improve-map\" href=\"https://www.mapbox.com/map-feedback/\" target=\"_blank\">Improve this map</a>",
+        "attribution": " <a href=\"http://www.openmaptiles.org/\" target=\"_blank\">&copy; OpenMapTiles</a> <a href=\"http://www.openstreetmap.org/about/\" target=\"_blank\">&copy; OpenStreetMap contributors</a>",
         "mode": "night",
         "start": 19,
         "end": 7