diff --git a/blog-assets/eks-cluster-prework/templates/eks-cluster-prework.template.yaml b/blog-assets/eks-cluster-prework/templates/eks-cluster-prework.template.yaml
index 550c28b..58571d2 100644
--- a/blog-assets/eks-cluster-prework/templates/eks-cluster-prework.template.yaml
+++ b/blog-assets/eks-cluster-prework/templates/eks-cluster-prework.template.yaml
@@ -34,7 +34,7 @@ Resources:
         # Cluster properties
         ProvisionBastionHost: Enabled
         RemoteAccessCIDR: !Ref AccessCIDR
-	
+        AvailabilityZones: !Join [ ',', !Ref 'AvailabilityZones' ]
         NodeInstanceType: t3.large
         NumberOfNodes: 1
         MaxNumberOfNodes: 1