diff --git a/README.md b/README.md
index 9f4f8903..7b0f6a60 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ fastify.post('/', async function (req, reply) {
   reply.send()
 })
 
-fastify.listen(3000, err => {
+fastify.listen({ port: 3000 }, err => {
   if (err) throw err
   console.log(`server listening on ${fastify.server.address().port}`)
 })
diff --git a/callback.md b/callback.md
index 17f9052a..00e01335 100644
--- a/callback.md
+++ b/callback.md
@@ -56,7 +56,7 @@ fastify.post('/', function (req, reply) {
   }
 })
 
-fastify.listen(3000, err => {
+fastify.listen({ port: 3000 }, err => {
   if (err) throw err
   console.log(`server listening on ${fastify.server.address().port}`)
 })
diff --git a/examples/example-legacy-validation.js b/examples/example-legacy-validation.js
index 35794e1f..40b38b16 100644
--- a/examples/example-legacy-validation.js
+++ b/examples/example-legacy-validation.js
@@ -24,7 +24,7 @@ fastify.post('/upload/files', {
   reply.send('done')
 })
 
-fastify.listen(3000, err => {
+fastify.listen({ port: 3000 }, err => {
   if (err) throw err
   console.log(`server listening on ${fastify.server.address().port}`)
 })
diff --git a/examples/example-legacy.js b/examples/example-legacy.js
index 61164271..fe90b777 100644
--- a/examples/example-legacy.js
+++ b/examples/example-legacy.js
@@ -31,7 +31,7 @@ fastify.post('/upload/files', function (req, reply) {
   }
 })
 
-fastify.listen(3000, err => {
+fastify.listen({ port: 3000 }, err => {
   if (err) throw err
   console.log(`server listening on ${fastify.server.address().port}`)
 })
diff --git a/examples/example-validation.js b/examples/example-validation.js
index 705245f5..fe0326e0 100644
--- a/examples/example-validation.js
+++ b/examples/example-validation.js
@@ -23,7 +23,7 @@ fastify.post('/upload/files', {
   reply.send('done')
 })
 
-fastify.listen(3000, err => {
+fastify.listen({ port: 3000 }, err => {
   if (err) throw err
   console.log(`server listening on ${fastify.server.address().port}`)
 })
diff --git a/examples/example.js b/examples/example.js
index 346b05c6..dd8fa5d1 100644
--- a/examples/example.js
+++ b/examples/example.js
@@ -58,7 +58,7 @@ fastify.post('/upload/files', async function (req, reply) {
   reply.send()
 })
 
-fastify.listen(3000, err => {
+fastify.listen({ port: 3000 }, err => {
   if (err) throw err
   console.log(`server listening on ${fastify.server.address().port}`)
 })