diff --git a/message.go b/message.go
index 6c6b48f..61cd0d9 100644
--- a/message.go
+++ b/message.go
@@ -36,6 +36,8 @@ const (
 	MessageTypeChannelFollowAdd
 	MessageTypeGuildDiscoveryDisqualified = iota + 1
 	MessageTypeGuildDiscoveryRequalified
+	MessageTypeReply = iota + 4
+	MessageTypeApplicationCommand
 )
 
 // A Message stores all data related to a specific Discord message.