diff --git a/docs/diagrams/BetterModelClassDiagram.puml b/docs/diagrams/BetterModelClassDiagram.puml
index 3567d89db0b..8197d00dbb6 100644
--- a/docs/diagrams/BetterModelClassDiagram.puml
+++ b/docs/diagrams/BetterModelClassDiagram.puml
@@ -10,9 +10,11 @@ UniqueTagList -[hidden]down- UniquePersonList
 UniqueTagList -[hidden]down- UniquePersonList
 
 UniqueTagList -right-> "*" Tag
+UniqueWeekNumberList -right-> "*" WeekNumber
 UniquePersonList -right-> Person
 
 Person -up-> "*" Tag
+Person -up-> "*" WeekNumber
 
 Person *--> Name
 Person *--> NusNetId
diff --git a/docs/diagrams/ModelClassDiagram.puml b/docs/diagrams/ModelClassDiagram.puml
index 304def78519..47bfc6ac56e 100644
--- a/docs/diagrams/ModelClassDiagram.puml
+++ b/docs/diagrams/ModelClassDiagram.puml
@@ -22,7 +22,8 @@ Class Email
 Class Name
 Class Phone
 Class Tag
-Class Course
+Class WeekNumber
+
 
 Class I #FFFFFF
 }
@@ -48,6 +49,7 @@ Person *--> Phone
 Person *--> Email
 Person *--> Address
 Person *--> "*" Tag
+Person *--> "*" WeekNumber
 
 Person -[hidden]up--> I
 UniquePersonList -[hidden]right-> I