diff --git a/Protocol.md b/Protocol.md
index 7d48a06..96eea1d 100644
--- a/Protocol.md
+++ b/Protocol.md
@@ -7,4 +7,5 @@
 
 # Ressources
 * List of used [ActivityStreams](ActivityStreams)
-* List of [Notifications](Notifications)
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+* List of [Notifications](Notifications)
+* Description of the [message flow](https://github.com/friendica/friendica/blob/master/doc/Message-Flow.md)
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