diff --git a/README.md b/README.md
index 2e93a043d7d5193aa1a16bf8e000563932ea3559..5b6fd54e27c6ed384dc1168f2af665819a7156ba 100644
--- a/README.md
+++ b/README.md
@@ -88,8 +88,8 @@ classDiagram
   Observer : +update(Subject) void
   Observer : +update(Subject, Object) void
 
-  Timer <|-- Subject
-  Chronometer <|-- Observer
+  Subject --|> Timer
+  Observer --|> Chronometer
 ```