The question is related to Node.js, when I run gulp I get an error: events.js 154, how can I fix it?

Question

Node.js

C:\proekt>gulp
[19:29:22] Using gulpfile C:\proekt\gulpfile.js
[19:29:22] Starting 'styles'...
[19:29:22] Finished 'styles' after 17 ms
[19:29:22] Starting 'express'...
[19:29:22] Finished 'express' after 91 ms
[19:29:22] Starting 'livereload'...
[19:29:22] Finished 'livereload' after 67 ms
[19:29:22] Starting 'watch'...
[19:29:23] Finished 'watch' after 43 ms
[19:29:23] Starting 'default'...
[ 19:29:23] Finished 'default' after 4.11 ?s
events.js:154
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE 127.0.0.1:80
at Object.exports.
at exports._exceptionWithHostPort (util.js:879:20)
at Server._listen2 (net.js:1236:14)
at listen (net.js:1272:10)
at net.js:1381:9
at GetAddrInfoReqWrap.asyncCallback [ as callback] (dns.js:63:16)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:82:10)

Answer 1

the port appears to be in use by another process

Answer 2

Thanks, I still have denver installed. Maybe this is the reason, do not tell me how to change the Node.js port