diff --git a/exercises-node/README.md b/exercises-node/README.md
index 4b36cda..1ff53ae 100644
--- a/exercises-node/README.md
+++ b/exercises-node/README.md
@@ -20,7 +20,7 @@ In this exercise, you'll use CDS to develop a reviews service which is able to e
 
 In this exercise, the bookstore and reviews service will come together. The bookstore will consume both the asynchronous and synchronous API that the reviews service exposes. By the end of this exercise, you will have set up the bookstore and reviews service for consumption, consumed events and exposed an entity of the reviews service from the bookstore.
 
-### [Exercise 4: Create an S/4 Extension with SAP Cloud Application Programming Model and SAP Cloud SDK [optional]](exercise05/README.md)
+### [Exercise 4: Create an S/4 Extension with SAP Cloud Application Programming Model and SAP Cloud SDK [optional]](exercise04/README.md)
 
 This exercise will take you to the SAP TechEd 2019 App Space mission *S/4HANA Extension with Cloud Application Programming Model*, which will show you how the SAP Cloud Application Programming Model can be used with the SAP Cloud SDK to consume a service from an SAP S/4HANA system in the context of extending core functionality with a new app and service.