diff --git a/RESOURCES.txt b/RESOURCES.txt
index 022e050..16f996e 100644
--- a/RESOURCES.txt
+++ b/RESOURCES.txt
@@ -1,2 +1,2 @@
 ON DEMAND COURSE
-*	Certified Kubernetes Administrator (CKA) 3rd edition: https://learning.oreilly.com/course/certified-kubernetes-administrator/9780138103804/
+*	Certified Kubernetes Administrator (CKA) 4th edition: https://learning.oreilly.com/course/certified-kubernetes-administrator/9780135375129/