diff --git a/lib/adapters/http.js b/lib/adapters/http.js
index dfa6386d..6a8a05dd 100755
--- a/lib/adapters/http.js
+++ b/lib/adapters/http.js
@@ -268,7 +268,8 @@ const buildAddressEntry = (address, family) => resolveFamily(utils.isObject(addr
 
 const http2Transport = {
   request(options, cb) {
-      const authority = options.protocol + '//' + options.hostname + ':' + (options.port || 80);
+      const authority = options.protocol + '//' + options.hostname + ':' + (options.port ||(options.protocol === 'https:' ? 443 : 80));
+
 
       const {http2Options, headers} = options;