diff --git a/public/git-broadcast.php b/public/git-broadcast.php
index 5f09dfa..6e34704 100644
--- a/public/git-broadcast.php
+++ b/public/git-broadcast.php
@@ -163,7 +163,7 @@ switch($_SERVER['HTTP_X_GITHUB_EVENT']) {
 if(!empty($message)) {
     var_dump($message);
     $sock = fsockopen($config['boat']['host'], $config['boat']['port'], $errno, $errstr, 5);
-    $message = chr(0xF) . hash_hmac('sha256', $message, $config['boat']['secret']) . $message . chr(0xF);
+    $message = chr(1) . $message;
+    $message = hash_hmac('sha256', $message, $config['boat']['secret'], true) . $message;
     fwrite($sock, $message);
-    fflush($sock);
 }