diff --git a/README.md b/README.md
index 1dc70dd..1aecfbc 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
 # Update Resource Definitions for related Applications
 
-This repository contains reference material for Humanitec's tutorial on Resource Definitions for related Applications. You can find the full tutorial instructions here (link coming soon).
-
+This repository contains reference material for Humanitec's tutorial on [Updating Resource Definitions for related Applications](https://developer.humanitec.com/introduction/tutorials/update-resource-definitions-for-related-applications). Please find the full tutorial instructions in the linked documentation.
diff --git a/score/score-app1.yaml b/score/score-app1.yaml
index 38081f9..6afefd4 100644
--- a/score/score-app1.yaml
+++ b/score/score-app1.yaml
@@ -10,7 +10,7 @@ containers:
     command: ["/bin/bash"]
     args: ["-c", "while true; do printenv && sleep 100; done"]
     variables:
-      REDIS: ${externals.redis.host}
+      REDIS: ${resources.redis.host}
 resources:
-  "redis":
+  redis:
     type: redis
diff --git a/score/score-app2.yaml b/score/score-app2.yaml
index c4d89f0..c956f09 100644
--- a/score/score-app2.yaml
+++ b/score/score-app2.yaml
@@ -10,10 +10,10 @@ containers:
     command: ["/bin/bash"]
     args: ["-c", "while true; do printenv && sleep 100; done"]
     variables:
-      REDIS: ${externals.redis.host}
-      S3: ${externals.s3.bucket}
+      REDIS: ${resources.redis.host}
+      S3: ${resources.s3.bucket}
 resources:
-  "redis":
+  redis:
     type: redis
-  "s3":
+  s3:
     type: s3
diff --git a/score/score-app3.yaml b/score/score-app3.yaml
index 7933f96..a9c1fb9 100644
--- a/score/score-app3.yaml
+++ b/score/score-app3.yaml
@@ -10,7 +10,7 @@ containers:
     command: ["/bin/bash"]
     args: ["-c", "while true; do printenv && sleep 100; done"]
     variables:
-      POSTGRES: ${externals.postgres.host}
+      POSTGRES: ${resources.postgres.host}
 resources:
-  "postgres":
+  postgres:
     type: postgres
diff --git a/terraform/matching.tf b/terraform/matching.tf
index 2aeb4d2..3a791b6 100644
--- a/terraform/matching.tf
+++ b/terraform/matching.tf
@@ -17,3 +17,18 @@ resource "humanitec_resource_definition_criteria" "criteria4" {
   resource_definition_id = humanitec_resource_definition.postgres.id
   app_id                 = "app3"
 }
+
+
+# Matching criteria for the target Kubernetes cluster
+resource "humanitec_resource_definition_criteria" "cluster-app1" {
+  resource_definition_id = var.k8s_resDef
+  app_id                 = "app1"
+}
+resource "humanitec_resource_definition_criteria" "cluster-app2" {
+  resource_definition_id = var.k8s_resDef
+  app_id                 = "app2"
+}
+resource "humanitec_resource_definition_criteria" "cluster-app3" {
+  resource_definition_id = var.k8s_resDef
+  app_id                 = "app3"
+}
\ No newline at end of file
diff --git a/terraform/provider.tf b/terraform/provider.tf
index 5ee2fea..241edbe 100644
--- a/terraform/provider.tf
+++ b/terraform/provider.tf
@@ -18,3 +18,6 @@ variable "org" {
 
 variable "token" {
 }
+
+variable "k8s_resDef" {
+}
\ No newline at end of file
diff --git a/terraform/resdef.tf b/terraform/resdef.tf
index 8dc9072..d298b05 100644
--- a/terraform/resdef.tf
+++ b/terraform/resdef.tf
@@ -5,7 +5,7 @@ variable "instance_type" {
 resource "humanitec_resource_definition" "redis" {
   name        = "redis"
   id          = "redis"
-  driver_type = "${var.org}/terraform"
+  driver_type = "humanitec/terraform"
   type        = "redis"
 
   driver_inputs = {
@@ -37,7 +37,7 @@ resource "humanitec_resource_definition" "redis" {
 resource "humanitec_resource_definition" "bucket" {
   name        = "bucket"
   id          = "bucket"
-  driver_type = "${var.org}/terraform"
+  driver_type = "humanitec/terraform"
   type        = "s3"
 
   driver_inputs = {
@@ -69,7 +69,7 @@ resource "humanitec_resource_definition" "bucket" {
 resource "humanitec_resource_definition" "postgres" {
   name        = "postgres"
   id          = "postgres"
-  driver_type = "${var.org}/terraform"
+  driver_type = "humanitec/terraform"
   type        = "postgres"
 
   driver_inputs = {
diff --git a/terraform/terraform.tfvars.example b/terraform/terraform.tfvars.example
index 09b85a1..a7247f1 100644
--- a/terraform/terraform.tfvars.example
+++ b/terraform/terraform.tfvars.example
@@ -1,4 +1,6 @@
 # The Humanitec Organization ID. Must be all lowercase.
 org = ""
 # The Humanitec API Token.
-token = ""
\ No newline at end of file
+token = ""
+# The id of the Resource Definition of the target Kubernetes Cluster
+k8s_resDef  = ""
\ No newline at end of file