diff --git a/helm-guestbook/templates/deployment.yaml b/helm-guestbook/templates/deployment.yaml
index 980df25..ab4b098 100644
--- a/helm-guestbook/templates/deployment.yaml
+++ b/helm-guestbook/templates/deployment.yaml
@@ -26,7 +26,7 @@ spec:
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           ports:
             - name: http
-              containerPort: 80
+              containerPort: {{ .Values.containerPort }}
               protocol: TCP
           livenessProbe:
             httpGet:
diff --git a/helm-guestbook/values.yaml b/helm-guestbook/values.yaml
index 3666712..642921f 100644
--- a/helm-guestbook/values.yaml
+++ b/helm-guestbook/values.yaml
@@ -9,6 +9,8 @@ image:
   tag: 0.1
   pullPolicy: IfNotPresent
 
+containerPort: 80
+
 service:
   type: ClusterIP
   port: 80