diff --git a/README.md b/README.md
index 1cc1f334ceab9b0989fbf0df4ccd2c19c393a809..10b9ba25a8e43260ffaf415ccc28c02cadb78421 100644
--- a/README.md
+++ b/README.md
@@ -87,8 +87,8 @@ classDiagram
         +fahren(pKm: double): boolean
         +tanken(pLiter: double): boolean
     }
-    Person -- Roller : meinRoller
-    Person -- Tankstelle : die Tankstelle
+    Person --> "1" Roller : meinRoller
+    Person --> "0..1" Tankstelle : die Tankstelle
 ```
 
 ## Projekt-Dokumentation