diff --git a/Documents/proto/messaging_extension/use_case_messagerie.uml b/Documents/proto/messaging_extension/use_case_messagerie.uml
index d0d4b8b..90e8375 100644
--- a/Documents/proto/messaging_extension/use_case_messagerie.uml
+++ b/Documents/proto/messaging_extension/use_case_messagerie.uml
@@ -5,14 +5,13 @@ left to right direction
 :Student: as s
 :Teacher: as t
 
-
 package "Messagerie"{
 
 (Answer topics) as at
-(Ask appointement) as aa
-(Create Discution) as cd
+(Ask appointment) as aa
+(Create Discussion) as cd
 (Create Forum) as cf
-(Manage appointement) as ma
+(Manage appointment) as ma
 
 s -- at
 s -- aa
@@ -32,7 +31,7 @@ cf <-- pt : << include >>
 pt <|-- (Post poll)
 cd <-- (Send messages) : << include >>
 
-ma <-- (Propose new appointment) : << exlude>> \n [refuse]
+ma <-- (Propose new appointment) : << extends >> \n [refuse]
 
 }