From 52d9096b14a500dc7629e620deddfa6a14b091b6 Mon Sep 17 00:00:00 2001
From: Harm Bandstra <hbandstra@gmail.com>
Date: Mon, 27 Mar 2017 16:32:27 +0200
Subject: [PATCH] Explicitly set content-type header, and post JSON as body

---
 src/Monolog/Handler/SlackWebhookHandler.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Monolog/Handler/SlackWebhookHandler.php b/src/Monolog/Handler/SlackWebhookHandler.php
index 0d3e3ea1..c890d93e 100644
--- a/src/Monolog/Handler/SlackWebhookHandler.php
+++ b/src/Monolog/Handler/SlackWebhookHandler.php
@@ -87,7 +87,8 @@ class SlackWebhookHandler extends AbstractProcessingHandler
         if (defined('CURLOPT_SAFE_UPLOAD')) {
             curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true);
         }
-        curl_setopt($ch, CURLOPT_POSTFIELDS, array('payload' => $postString));
+        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-type: application/json']);
+        curl_setopt($ch, CURLOPT_POSTFIELDS, $postString);
 
         Curl\Util::execute($ch);
     }