diff --git a/js/Map.js b/js/Map.js
index 26ac299..9f49e8f 100644
--- a/js/Map.js
+++ b/js/Map.js
@@ -31,12 +31,13 @@ BR.Map = {
 
         var thunderforestAttribution = 'tiles &copy; <a target="_blank" href="http://www.thunderforest.com">Thunderforest</a> '
             + '(<a target="_blank" href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA 2.0</a>)';
-        var cycle = L.tileLayer('http://{s}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png', {
+        var thunderforestAuth = BR.keys.thunderforest ? '?apikey=' + BR.keys.thunderforest : '';
+        var cycle = L.tileLayer('http://{s}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' + thunderforestAuth, {
             maxNativeZoom: 18,
             maxZoom: maxZoom,
             attribution: thunderforestAttribution
         });
-        var outdoors = L.tileLayer('http://{s}.tile.thunderforest.com/outdoors/{z}/{x}/{y}.png', {
+        var outdoors = L.tileLayer('http://{s}.tile.thunderforest.com/outdoors/{z}/{x}/{y}.png' + thunderforestAuth, {
             maxNativeZoom: 18,
             maxZoom: maxZoom,
             attribution: thunderforestAttribution
diff --git a/keys.js.template b/keys.js.template
index 96b7a82..2597bd4 100644
--- a/keys.js.template
+++ b/keys.js.template
@@ -7,7 +7,10 @@
         bing: '',
         
         // DigitalGlobe, https://developer.digitalglobe.com/maps-api/#plans
-        digitalGlobe: ''
+        digitalGlobe: '',
+
+        // Thunderforest, http://thunderforest.com/pricing/
+        thunderforest: ''
     };
 
 })();