diff --git a/index.js b/index.js
index a633912..25ab65e 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,7 @@ const verifyBearerAuthFactory = require('./lib/verify-bearer-auth-factory')
 const { FST_BEARER_AUTH_INVALID_LOG_LEVEL } = require('./lib/errors')
 
 function fastifyBearerAuth (fastify, options, done) {
-  options = Object.assign({ addHook: true, verifyErrorLogLevel: 'error' }, options)
+  options = { addHook: true, verifyErrorLogLevel: 'error', ...options }
 
   if (
     Object.prototype.hasOwnProperty.call(fastify.log, 'error') === false ||
diff --git a/lib/verify-bearer-auth-factory.js b/lib/verify-bearer-auth-factory.js
index aa17167..a9214c5 100644
--- a/lib/verify-bearer-auth-factory.js
+++ b/lib/verify-bearer-auth-factory.js
@@ -26,7 +26,7 @@ const defaultOptions = {
 }
 
 module.exports = function verifyBearerAuthFactory (options, done) {
-  const _options = Object.assign({}, defaultOptions, options)
+  const _options = { ...defaultOptions, ...options }
   if (_options.keys instanceof Set) {
     _options.keys = Array.from(_options.keys)
   } else if (Array.isArray(_options.keys)) {