diff --git a/src/Ratchet/Http/OriginCheck.php b/src/Ratchet/Http/OriginCheck.php
index 580935a..8d5f7a1 100644
--- a/src/Ratchet/Http/OriginCheck.php
+++ b/src/Ratchet/Http/OriginCheck.php
@@ -31,7 +31,8 @@ class OriginCheck implements HttpServerInterface {
      * {@inheritdoc}
      */
     public function onOpen(ConnectionInterface $conn, RequestInterface $request = null) {
-        $origin = (string)$request->getHeader('Origin');
+        $header = (string)$request->getHeader('Origin');
+        $origin = parse_url($header, PHP_URL_HOST) ?: $header;
 
         if (!in_array($origin, $this->allowedOrigins)) {
             return $this->close($conn, 403);