diff --git a/lib/GameResolver.js b/lib/GameResolver.js
index 2139033..1bb5739 100644
--- a/lib/GameResolver.js
+++ b/lib/GameResolver.js
@@ -12,7 +12,7 @@ export default class GameResolver {
   lookup (type) {
     if (!type) { throw Error('No game specified') }
 
-    if (type.substring(0, 9) === 'protocol-') {
+    if (type.startsWith('protocol-')) {
       return {
         protocol: type.substring(9)
       }