diff --git a/src/Handshake/NegotiatorInterface.php b/src/Handshake/NegotiatorInterface.php
index 662ae95..c152eca 100644
--- a/src/Handshake/NegotiatorInterface.php
+++ b/src/Handshake/NegotiatorInterface.php
@@ -41,7 +41,7 @@ interface NegotiatorInterface {
      * @param boolean $enable
      * @todo Consider extending this interface and moving this there.
      *       The spec does says the server can fail for this reason, but
-             it is not a requirement. This is an implementation detail.
+     *       it is not a requirement. This is an implementation detail.
      */
     function setStrictSubProtocolCheck($enable);
 }
diff --git a/src/Handshake/ServerNegotiator.php b/src/Handshake/ServerNegotiator.php
index f1e0ae0..6568684 100644
--- a/src/Handshake/ServerNegotiator.php
+++ b/src/Handshake/ServerNegotiator.php
@@ -40,7 +40,7 @@ class ServerNegotiator implements NegotiatorInterface {
      */
     public function handshake(RequestInterface $request) {
         if (true !== $this->verifier->verifyMethod($request->getMethod())) {
-            return new Response(405);
+            return new Response(405, ['Allow' => 'GET']);
         }
 
         if (true !== $this->verifier->verifyHTTPVersion($request->getProtocolVersion())) {