diff --git a/src/serve_font.js b/src/serve_font.js
index 1558fb8..49ae7e1 100644
--- a/src/serve_font.js
+++ b/src/serve_font.js
@@ -1,7 +1,9 @@
 'use strict';
 
 var clone = require('clone'),
-    express = require('express');
+    express = require('express'),
+    fs = require('fs'),
+    path = require('path');
 
 var utils = require('./utils');
 
@@ -12,14 +14,29 @@ module.exports = function(options, allowedFonts) {
 
   var fontPath = options.paths.fonts;
 
+  var existingFonts = {};
+  fs.readdir(options.paths.fonts, function(err, files) {
+    files.forEach(function(file) {
+      fs.stat(path.join(fontPath, file), function(err, stats) {
+        if (!err) {
+          if (stats.isDirectory()) {
+            existingFonts[path.basename(file)] = true;
+          }
+        }
+      });
+    });
+  });
+
   app.get('/:fontstack/:range([\\d]+-[\\d]+).pbf',
       function(req, res, next) {
     var fontstack = decodeURI(req.params.fontstack);
     var range = req.params.range;
 
-    return utils.getFontsPbf(allowedFonts, fontPath, fontstack, range,
+    return utils.getFontsPbf(allowedFonts, fontPath, fontstack, range, existingFonts,
         function(err, concated) {
       if (err || concated.length === 0) {
+        console.log(err);
+        console.log(concated.length);
         return res.status(400).send('');
       } else {
         res.header('Content-type', 'application/x-protobuf');
diff --git a/src/serve_rendered.js b/src/serve_rendered.js
index f44dba6..200400d 100644
--- a/src/serve_rendered.js
+++ b/src/serve_rendered.js
@@ -49,6 +49,19 @@ module.exports = function(options, repo, params, id, dataResolver) {
     sources: {}
   };
 
+  var existingFonts = {};
+  fs.readdir(options.paths.fonts, function(err, files) {
+    files.forEach(function(file) {
+      fs.stat(path.join(options.paths.fonts, file), function(err, stats) {
+        if (!err) {
+          if (stats.isDirectory()) {
+            existingFonts[path.basename(file)] = true;
+          }
+        }
+      });
+    });
+  });
+
   var styleJSON;
   var createPool = function(ratio, min, max) {
     var createRenderer = function(ratio, createCallback) {
@@ -67,7 +80,7 @@ module.exports = function(options, repo, params, id, dataResolver) {
             var parts = req.url.split('/');
             var fontstack = unescape(parts[2]);
             var range = parts[3].split('.')[0];
-            utils.getFontsPbf(null, options.paths[protocol], fontstack, range,
+            utils.getFontsPbf(null, options.paths[protocol], fontstack, range, existingFonts,
                 function(err, concated) {
               callback(err, {data: concated});
             });
@@ -148,13 +161,13 @@ module.exports = function(options, repo, params, id, dataResolver) {
   styleJSON = clone(require(styleJSONPath));
 
   var httpTester = /^(http(s)?:)?\/\//;
-  if (!httpTester.test(styleJSON.sprite)) {
+  if (styleJSON.sprite && !httpTester.test(styleJSON.sprite)) {
     styleJSON.sprite = 'sprites://' +
         styleJSON.sprite
             .replace('{style}', path.basename(styleFile, '.json'))
             .replace('{styleJsonFolder}', path.relative(options.paths.sprites, path.dirname(styleJSONPath)));
   }
-  if (!httpTester.test(styleJSON.glyphs)) {
+  if (styleJSON.glyphs && !httpTester.test(styleJSON.glyphs)) {
     styleJSON.glyphs = 'fonts://' + styleJSON.glyphs;
   }
 
@@ -204,6 +217,9 @@ module.exports = function(options, repo, params, id, dataResolver) {
         }
         map.sources[name] = new mbtiles(mbtilesFile, function(err) {
           map.sources[name].getInfo(function(err, info) {
+            if (err) {
+              console.error(err);
+            }
             var type = source.type;
             Object.assign(source, info);
             source.type = type;
diff --git a/src/serve_style.js b/src/serve_style.js
index de0fe54..4fcbba5 100644
--- a/src/serve_style.js
+++ b/src/serve_style.js
@@ -46,7 +46,7 @@ module.exports = function(options, repo, params, id, reportTiles, reportFont) {
   var spritePath;
 
   var httpTester = /^(http(s)?:)?\/\//;
-  if (!httpTester.test(styleJSON.sprite)) {
+  if (styleJSON.sprite && !httpTester.test(styleJSON.sprite)) {
     spritePath = path.join(options.paths.sprites,
         styleJSON.sprite
             .replace('{style}', path.basename(styleFile, '.json'))
@@ -54,20 +54,23 @@ module.exports = function(options, repo, params, id, reportTiles, reportFont) {
             );
     styleJSON.sprite = 'local://styles/' + id + '/sprite';
   }
-  if (!httpTester.test(styleJSON.glyphs)) {
+  if (styleJSON.glyphs && !httpTester.test(styleJSON.glyphs)) {
     styleJSON.glyphs = 'local://fonts/{fontstack}/{range}.pbf';
   }
 
   repo[id] = styleJSON;
 
   app.get('/' + id + '.json', function(req, res, next) {
-    var fixUrl = function(url, opt_nokey) {
-      var queryParams = ['style=' + id];
+    var fixUrl = function(url, opt_nokey, opt_nostyle) {
+      var queryParams = [];
+      if (!opt_nostyle) {
+        queryParams.push('style=' + id);
+      }
       if (!opt_nokey && req.query.key) {
         queryParams.unshift('key=' + req.query.key);
       }
       var query = '';
-      if (!opt_nokey) {
+      if (queryParams.length) {
         query = '?' + queryParams.join('&');
       }
       return url.replace(
@@ -80,8 +83,12 @@ module.exports = function(options, repo, params, id, reportTiles, reportFont) {
       source.url = fixUrl(source.url);
     });
     // mapbox-gl-js viewer cannot handle sprite urls with query
-    styleJSON_.sprite = fixUrl(styleJSON_.sprite, true);
-    styleJSON_.glyphs = fixUrl(styleJSON_.glyphs);
+    if (styleJSON_.sprite) {
+      styleJSON_.sprite = fixUrl(styleJSON_.sprite, true, true);
+    }
+    if (styleJSON_.glyphs) {
+      styleJSON_.glyphs = fixUrl(styleJSON_.glyphs, false, true);
+    }
     return res.send(styleJSON_);
   });
 
diff --git a/src/utils.js b/src/utils.js
index b1fb4a1..261695f 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -4,7 +4,8 @@ var async = require('async'),
     path = require('path'),
     fs = require('fs');
 
-var glyphCompose = require('glyph-pbf-composite');
+var clone = require('clone'),
+    glyphCompose = require('glyph-pbf-composite');
 
 module.exports.getTileUrls = function(req, domains, path, format) {
 
@@ -51,13 +52,25 @@ module.exports.fixTileJSONCenter = function(tileJSON) {
   }
 };
 
-module.exports.getFontsPbf = function(allowedFonts, fontPath, names, range, callback) {
-  var getFontPbf = function(name, range, callback) {
-    if (!allowedFonts || allowedFonts[name]) {
+module.exports.getFontsPbf = function(allowedFonts, fontPath, names, range, fallbacks, callback) {
+  var getFontPbf = function(allowedFonts, name, range, callback, fallbacks) {
+    if (!allowedFonts || (allowedFonts[name] && fallbacks)) {
       var filename = path.join(fontPath, name, range + '.pbf');
+      if (!fallbacks) {
+        fallbacks = clone(allowedFonts || {});
+      }
+      delete fallbacks[name];
       return fs.readFile(filename, function(err, data) {
         if (err) {
-          return callback(new Error('Font load error: ' + name));
+          console.error('ERROR: Font not found:', name);
+          if (fallbacks && Object.keys(fallbacks).length) {
+            var fallbackName = Object.keys(fallbacks)[0];
+            console.error('ERROR: Trying to use', fallbackName, 'as a fallback');
+            delete fallbacks[fallbackName];
+            return getFontPbf(null, fallbackName, range, callback, fallbacks);
+          } else {
+            return callback(new Error('Font load error: ' + name));
+          }
         } else {
           return callback(null, data);
         }
@@ -71,7 +84,7 @@ module.exports.getFontsPbf = function(allowedFonts, fontPath, names, range, call
   var queue = [];
   fonts.forEach(function(font) {
     queue.push(function(callback) {
-      getFontPbf(font, range, callback);
+      getFontPbf(allowedFonts, font, range, callback, clone(allowedFonts || fallbacks));
     });
   });