diff --git a/examples/eks-cluster-with-vpc/variables.tf b/examples/eks-cluster-with-vpc/variables.tf
index 23329cb..bb93d3c 100644
--- a/examples/eks-cluster-with-vpc/variables.tf
+++ b/examples/eks-cluster-with-vpc/variables.tf
@@ -2,6 +2,12 @@ variable "cluster_name" {
   description = "Name of cluster - used by Terratest for e2e test automation"
   type        = string
   default     = ""
+
+  validation {
+    # cluster name is used as prefix on eks_blueprint module and cannot be >25 characters
+    condition     = can(regex("^[a-zA-Z][-a-zA-Z0-9]{3,24}$", var.cluster_name))
+    error_message = "Cluster name is used as a prefix-name for other resources. Max size is 25 chars and must satisfy regular expression pattern: '[a-zA-Z][-a-zA-Z0-9]{3,19}'."
+  }
 }
 variable "aws_region" {
   description = "AWS Region"
diff --git a/modules/eks-monitoring/dashboards/cluster.json b/modules/eks-monitoring/dashboards/cluster.json
index ae16330..af88e93 100644
--- a/modules/eks-monitoring/dashboards/cluster.json
+++ b/modules/eks-monitoring/dashboards/cluster.json
@@ -2999,4 +2999,4 @@
   "uid": "efa86fd1d0c121a26444b636a3f509a8",
   "version": 23,
   "weekStart": ""
-}
\ No newline at end of file
+}
diff --git a/modules/eks-monitoring/dashboards/namespace-workloads.json b/modules/eks-monitoring/dashboards/namespace-workloads.json
index b69d7a5..a1a1732 100644
--- a/modules/eks-monitoring/dashboards/namespace-workloads.json
+++ b/modules/eks-monitoring/dashboards/namespace-workloads.json
@@ -2657,4 +2657,4 @@
   "uid": "a87fb0d919ec0ea5f6543124e16c42a5",
   "version": 2,
   "weekStart": ""
-}
\ No newline at end of file
+}
diff --git a/modules/eks-monitoring/dashboards/workloads.json b/modules/eks-monitoring/dashboards/workloads.json
index 040e260..f50402c 100644
--- a/modules/eks-monitoring/dashboards/workloads.json
+++ b/modules/eks-monitoring/dashboards/workloads.json
@@ -2265,4 +2265,4 @@
   "uid": "a164a7f0339f99e89cea5cb47e9be617",
   "version": 7,
   "weekStart": ""
-}
\ No newline at end of file
+}