diff --git a/README.md b/README.md
index d80edae..13861c4 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ an overview over good priciples that should be applied to software design.
         - **Moral of the story: model your classes based on behaviours not on properties; model your data based on properties and not on behaviours. If it behaves like a duck, it's certainly a bird.**
         - **This strongly suggests that inheritance should never be used when the sub-class restricts the freedom implicit in the base class, but should only be used when the sub-class adds extra detail to the concept represented by the base class as in 'Monkey' is-an 'Animal'.**
     - `I`: Interface Segregation Principle
-        - [link](http://www.oodesign.com/dependency-inversion-principle.html)
+        - [link](http://www.oodesign.com/interface-segregation-principle.html)
         - [Wiki](https://en.wikipedia.org/wiki/Interface_segregation_principle)
     - `D`: Dependency Inversion Principle
         - [link](http://www.oodesign.com/dependency-inversion-principle.html)