diff --git a/README.md b/README.md
index c4c31d1..62f7dbd 100644
--- a/README.md
+++ b/README.md
@@ -79,9 +79,13 @@ curl -d '{"body":"new contrib from toto: [44](http://radio.localhost/map/#44)",
 ```
 (or localhost:4785 without docker)
 
-### Grafana
+### For Github
 
-Add a webhook with an URL like ending with `?formatter=grafana&key=API_KEY'
+Add a JSON webhook with `?formatter=github`, and put the `API_KEY` as secret
+
+### For Grafana
+
+Add a webhook with an URL ending with `?formatter=grafana&key=API_KEY'
 
 ## Test room
 
diff --git a/matrix_webhook/formatters.py b/matrix_webhook/formatters.py
index 1e4600e..bec0979 100644
--- a/matrix_webhook/formatters.py
+++ b/matrix_webhook/formatters.py
@@ -1,7 +1,7 @@
 """Formatters for matrix webhook."""
 
 
-def grafana(data):
+def grafana(data, headers):
     """Pretty-print a grafana notification."""
     text = ""
     if "title" in data:
diff --git a/matrix_webhook/handler.py b/matrix_webhook/handler.py
index 6ba9c59..ee48710 100644
--- a/matrix_webhook/handler.py
+++ b/matrix_webhook/handler.py
@@ -35,7 +35,9 @@ async def matrix_webhook(request):
 
     if "formatter" in request.rel_url.query:
         try:
-            data = getattr(formatters, request.rel_url.query["formatter"])(data)
+            data = getattr(formatters, request.rel_url.query["formatter"])(
+                data, request.headers
+            )
         except AttributeError:
             return utils.create_json_response(
                 HTTPStatus.BAD_REQUEST, "Unknown formatter"