diff --git a/config.json b/config.json
index 34376bb..770036e 100644
--- a/config.json
+++ b/config.json
@@ -30,6 +30,30 @@
   "maxAge": 14,
   "nodeZoom": 18,
   "mapLayers": [
+    {
+      "name": "Freifunk Regensburg",
+      // 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,
+        "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>",
+        "start": 6
+      }
+    },
+    {
+      "name": "Freifunk Regensburg Night",
+      // 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,
+        "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>",
+        "mode": "night",
+        "start": 19,
+        "end": 7
+      }
+    },
     {
       "name": "OpenStreetMap.HOT",
       "url": "https://{s}.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png",