diff --git a/src/utils.js b/src/utils.js
index 8eeb123..64a24e3 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -22,9 +22,9 @@ function tileToLat(tileY, zoom) {
   return (180.0 / Math.PI) * Math.atan(0.5 * (Math.exp(n) - Math.exp(-n)));
 }
 
-module.exports.getPublicUrl = (publicUrl, req) => publicUrl || `${req.protocol}://${req.headers.host}/`;
+export const getPublicUrl = (publicUrl, req) => publicUrl || `${req.protocol}://${req.headers.host}/`;
 
-module.exports.getTileUrls = (req, domains, path, format, publicUrl, aliases) => {
+export const getTileUrls = (req, domains, path, format, publicUrl, aliases) => {
 
   if (domains) {
     if (domains.constructor === String && domains.length > 0) {