diff --git a/src/Ratchet/App.php b/src/Ratchet/App.php
index 5094e7e4..3833fff8 100644
--- a/src/Ratchet/App.php
+++ b/src/Ratchet/App.php
@@ -3,8 +3,8 @@
 use React\EventLoop\Factory as LegacyLoopFactory;
 use React\EventLoop\Loop;
 use React\EventLoop\LoopInterface;
-use React\Socket\Server as Reactor;
-use React\Socket\SecureServer as SecureReactor;
+use React\Socket\Server as LegacySocketServer;
+use React\Socket\SocketServer;
 use Ratchet\Http\HttpServerInterface;
 use Ratchet\Http\OriginCheck;
 use Ratchet\Wamp\WampServerInterface;
@@ -80,7 +80,8 @@ public function __construct($httpHost = 'localhost', $port = 8080, $address = '1
         $this->httpHost = $httpHost;
         $this->port = $port;
 
-        $socket = new Reactor($address . ':' . $port, $loop, $context);
+        // prefer SocketServer (reactphp/socket v1.9+) over legacy \React\Socket\Server
+        $socket = class_exists('React\Socket\SocketServer') ? new SocketServer($address . ':' . $port, $context, $loop) : new LegacySocketServer($address . ':' . $port, $loop, $context);
 
         $this->routes  = new RouteCollection;
         $this->_server = new IoServer(new HttpServer(new Router(new UrlMatcher($this->routes, new RequestContext))), $socket, $loop);
@@ -94,7 +95,9 @@ public function __construct($httpHost = 'localhost', $port = 8080, $address = '1
         } else {
             $flashUri = 8843;
         }
-        $flashSock = new Reactor($flashUri, $loop);
+
+        // prefer SocketServer (reactphp/socket v1.9+) over legacy \React\Socket\Server
+        $flashSock = class_exists('React\Socket\SocketServer') ? new SocketServer($flashUri, [], $loop) : new LegacySocketServer($flashUri, $loop);
         $this->flashServer = new IoServer($policy, $flashSock);
     }
 
diff --git a/src/Ratchet/Server/IoServer.php b/src/Ratchet/Server/IoServer.php
index 30b4c8fc..d54f20f5 100644
--- a/src/Ratchet/Server/IoServer.php
+++ b/src/Ratchet/Server/IoServer.php
@@ -5,9 +5,9 @@
 use React\EventLoop\Loop;
 use React\EventLoop\LoopInterface;
 use React\Socket\ConnectionInterface as SocketConnection;
+use React\Socket\Server as LegacySocketServer;
 use React\Socket\ServerInterface;
-use React\Socket\Server as Reactor;
-use React\Socket\SecureServer as SecureReactor;
+use React\Socket\SocketServer;
 
 /**
  * Creates an open-ended socket to listen on a port for incoming connections.
@@ -64,7 +64,8 @@ public static function factory(MessageComponentInterface $component, $port = 80,
         // prefer default Loop (reactphp/event-loop v1.2+) over legacy \React\EventLoop\Factory
         $loop = class_exists('React\EventLoop\Loop') ? Loop::get() : LegacyLoopFactory::create();
 
-        $socket = new Reactor($address . ':' . $port, $loop);
+        // prefer SocketServer (reactphp/socket v1.9+) over legacy \React\Socket\Server
+        $socket = class_exists('React\Socket\SocketServer') ? new SocketServer($address . ':' . $port, [], $loop) : new LegacySocketServer($address . ':' . $port, $loop);
 
         return new static($component, $socket, $loop);
     }
diff --git a/tests/autobahn/bin/fuzzingserver.php b/tests/autobahn/bin/fuzzingserver.php
index 66d37048..d3b562cc 100644
--- a/tests/autobahn/bin/fuzzingserver.php
+++ b/tests/autobahn/bin/fuzzingserver.php
@@ -22,7 +22,9 @@ public function onError(ConnectionInterface $conn, \Exception $e) {
     $impl = sprintf('React\EventLoop\%sLoop', $argc > 2 ? $argv[2] : 'StreamSelect');
 
     $loop = new $impl;
-    $sock = new React\Socket\Server('0.0.0.0:' . $port, $loop);
+
+    // prefer SocketServer (reactphp/socket v1.9+) over legacy \React\Socket\Server
+    $sock = class_exists('React\Socket\SocketServer') ? new React\Socket\SocketServer('0.0.0.0:' . $port, [], $loop) : new React\Socket\Server('0.0.0.0:' . $port, $loop);
 
     $wsServer = new Ratchet\WebSocket\WsServer(new BinaryEcho);
     // This is enabled to test https://github.com/ratchetphp/Ratchet/issues/430
diff --git a/tests/unit/Server/IoServerTest.php b/tests/unit/Server/IoServerTest.php
index 5b470c6c..c49c6da4 100644
--- a/tests/unit/Server/IoServerTest.php
+++ b/tests/unit/Server/IoServerTest.php
@@ -3,7 +3,8 @@
 use PHPUnit\Framework\TestCase;
 use React\EventLoop\StreamSelectLoop;
 use React\EventLoop\LoopInterface;
-use React\Socket\Server;
+use React\Socket\Server as LegacySocketServer;
+use React\Socket\SocketServer;
 
 /**
  * @covers Ratchet\Server\IoServer
@@ -32,7 +33,9 @@ public function setUpServer() {
         $this->app = $this->getMockBuilder('Ratchet\\MessageComponentInterface')->getMock();
 
         $loop = new StreamSelectLoop;
-        $this->reactor = new Server(0, $loop);
+
+        // prefer SocketServer (reactphp/socket v1.9+) over legacy \React\Socket\Server
+        $this->reactor = class_exists('React\Socket\SocketServer') ? new SocketServer('127.0.0.1:0', [], $loop) : new LegacySocketServer('127.0.0.1:0', $loop);
 
         $uri = $this->reactor->getAddress();
         $this->port   = parse_url((strpos($uri, '://') === false ? 'tcp://' : '') . $uri, PHP_URL_PORT);