diff --git a/examples/dynamic-openapi-joi.js b/examples/dynamic-openapi-joi.js
new file mode 100644
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--- /dev/null
+++ b/examples/dynamic-openapi-joi.js
@@ -0,0 +1,69 @@
+'use strict'
+
+const fastify = require('fastify')()
+// joi-to-json is one of the packages that can convert joi to json schema
+// you are feel free to use other package that have the similar function
+const convert = require('joi-to-json')
+const Joi = require('joi')
+
+fastify.register(require('../index'), {
+  openapi: {
+    info: {
+      title: 'Test swagger',
+      description: 'testing the fastify swagger api',
+      version: '0.1.0'
+    },
+    servers: [{
+      url: 'http://localhost'
+    }],
+    components: {
+      securitySchemes: {
+        apiKey: {
+          type: 'apiKey',
+          name: 'apiKey',
+          in: 'header'
+        }
+      }
+    }
+  },
+  exposeRoute: true,
+  transform: schema => {
+    const {
+      params = undefined,
+      body = undefined,
+      querystring = undefined,
+      ...others
+    } = schema
+    const transformed = { ...others }
+    if (params) transformed.params = convert(params)
+    if (body) transformed.body = convert(body)
+    if (querystring) transformed.querystring = convert(querystring)
+    return transformed
+  }
+})
+
+fastify.put('/some-route/:id', {
+  schema: {
+    description: 'post some data',
+    tags: ['user', 'code'],
+    summary: 'qwerty',
+    security: [{ apiKey: [] }],
+    body: Joi.object().keys({
+      hello: Joi.string().required()
+    }).required(),
+    response: {
+      201: {
+        description: 'Succesful response',
+        type: 'object',
+        properties: {
+          hello: { type: 'string' }
+        }
+      }
+    }
+  }
+}, (req, reply) => { reply.send({ hello: `Hello ${req.body.hello}` }) })
+
+fastify.listen(3000, err => {
+  if (err) throw err
+  console.log('listening')
+})