diff --git a/src/serve_style.js b/src/serve_style.js
index fb75ad8..a04f181 100644
--- a/src/serve_style.js
+++ b/src/serve_style.js
@@ -24,9 +24,25 @@ const fixUrl = (req, url, publicUrl, opt_nokey) => {
     query = `?${queryParams.join('&')}`;
   }
   return url.replace(
-    'local://', utils.getPublicUrl(publicUrl, req)) + query;
+    'local://', utils.getPublicUrl(publicUrl, req)) + + getQuery(req, opt_nokey);
 };
 
+
+// Return the query suffix from the original request
+const getQuery = (req, opt_nokey) => {
+  const queryParams = [];
+  if (!opt_nokey && req.query.key) {
+    queryParams.unshift(`key=${encodeURIComponent(req.query.key)}`);
+  }
+
+  let query = '';
+  if (queryParams.length) {
+    query = `?${queryParams.join('&')}`;
+  }
+
+  return query;
+}
+
 module.exports = {
   init: (options, repo) => {
     const app = express().disable('x-powered-by');
@@ -40,6 +56,13 @@ module.exports = {
       for (const name of Object.keys(styleJSON_.sources)) {
         const source = styleJSON_.sources[name];
         source.url = fixUrl(req, source.url, item.publicUrl);
+
+        // Apply the query parameters to the tile urls
+        if (source.tiles) {
+          for (let i = 0; i < source.tiles.length; i++) {
+            source.tiles[i] = source.tiles[i] + getQuery(req);
+          }
+        }
       }
       // mapbox-gl-js viewer cannot handle sprite urls with query
       if (styleJSON_.sprite) {