diff --git a/github_webhook/webhook.py b/github_webhook/webhook.py
index d6addf9..d0d019e 100644
--- a/github_webhook/webhook.py
+++ b/github_webhook/webhook.py
@@ -2,6 +2,7 @@
 import hashlib
 import hmac
 import logging
+import json
 
 import six
 from flask import abort, request
@@ -58,7 +59,12 @@ def _postreceive(self):
                 abort(400, "Invalid signature")
 
         event_type = _get_header("X-Github-Event")
-        data = request.get_json()
+        content_type = _get_header('content-type')
+
+        if content_type == "application/x-www-form-urlencoded":
+            data = json.loads(request.form.to_dict(flat=True)["payload"])
+        else:
+            data = request.get_json()
 
         if data is None:
             abort(400, "Request body must contain json")
@@ -121,7 +127,6 @@ def _format_event(event_type, data):
     except KeyError:
         return event_type
 
-
 # -----------------------------------------------------------------------------
 # Copyright 2015 Bloomberg Finance L.P.
 #