diff --git a/docs/diagrams/ModelClassDiagram.puml b/docs/diagrams/ModelClassDiagram.puml
index 0de5673070d..d2b716649f1 100644
--- a/docs/diagrams/ModelClassDiagram.puml
+++ b/docs/diagrams/ModelClassDiagram.puml
@@ -37,10 +37,10 @@ UserPrefs .up.|> ReadOnlyUserPrefs
 
 AddressBook *--> "1" UniquePersonList
 UniquePersonList --> "~* all" Person
-Person *--> Name
-Person *--> Phone
-Person *--> Email
-Person *--> Address
+Person *--> "1" Name
+Person *--> "1" Phone
+Person *--> "1" Email
+Person *--> "1" Address
 Person *--> "*" Tag
 
 Person -[hidden]up--> I