diff --git a/example/hosts.allinone b/example/hosts.allinone
index e6e014a..e99361b 100644
--- a/example/hosts.allinone
+++ b/example/hosts.allinone
@@ -43,7 +43,7 @@ SERVICE_CIDR="10.68.0.0/16"
 CLUSTER_CIDR="172.20.0.0/16"
 
 # NodePort Range
-NODE_PORT_RANGE="20000-40000"
+NODE_PORT_RANGE="30000-32767"
 
 # Cluster DNS Domain
 CLUSTER_DNS_DOMAIN="cluster.local."
diff --git a/example/hosts.multi-node b/example/hosts.multi-node
index d803f06..0c538fa 100644
--- a/example/hosts.multi-node
+++ b/example/hosts.multi-node
@@ -47,7 +47,7 @@ SERVICE_CIDR="10.68.0.0/16"
 CLUSTER_CIDR="172.20.0.0/16"
 
 # NodePort Range
-NODE_PORT_RANGE="20000-40000"
+NODE_PORT_RANGE="30000-32767"
 
 # Cluster DNS Domain
 CLUSTER_DNS_DOMAIN="cluster.local."
diff --git a/roles/cluster-addon/templates/prometheus/values.yaml.j2 b/roles/cluster-addon/templates/prometheus/values.yaml.j2
index 1d891e0..eb13c78 100644
--- a/roles/cluster-addon/templates/prometheus/values.yaml.j2
+++ b/roles/cluster-addon/templates/prometheus/values.yaml.j2
@@ -22,7 +22,7 @@ alertmanager:
 
   ## Configuration for Alertmanager service
   service:
-    nodePort: 39902
+    nodePort: 30902
     type: NodePort 
 
   alertmanagerSpec:
@@ -42,7 +42,7 @@ grafana:
   adminPassword: Admin1234!
 
   service:
-    nodePort: 39903
+    nodePort: 30903
     type: NodePort 
 
 ## Component scraping the kube api server
@@ -127,8 +127,8 @@ prometheusOperator:
   thanosRulerInstanceNamespaces: []
 
   service:
-    nodePort: 39899
-    nodePortTls: 39900
+    nodePort: 30899
+    nodePortTls: 30900
     type: NodePort 
 
   nodeSelector: {}
@@ -154,7 +154,7 @@ prometheus:
 
   ## Configuration for Prometheus service
   service:
-    nodePort: 39901
+    nodePort: 30901
     type: NodePort 
 
   ## Settings affecting prometheusSpec