diff --git a/main.tf b/main.tf
index dd79b2f..9ee6994 100644
--- a/main.tf
+++ b/main.tf
@@ -1,13 +1,14 @@
 data "aws_eks_cluster_auth" "cluster" {
   name = var.cluster_name
 }
+
 resource "null_resource" "helm_install" {
   triggers = {
     chart_name     = var.chart_name
     chart_version  = var.chart_version
     release_name   = var.release_name
     namespace      = var.namespace
-    update_trigger = var.trigger_helm_update != null ? var.trigger_helm_update : "initial"
+    update_trigger = var.trigger_helm_update != null ? timestamp() : "initial"
   }
 
   provisioner "local-exec" {
diff --git a/variables.tf b/variables.tf
index 022c7bc..79744a7 100644
--- a/variables.tf
+++ b/variables.tf
@@ -56,6 +56,6 @@ variable "set_values" {
 }
 variable "trigger_helm_update" {
   description = "Set this to any value to trigger a Helm chart update"
-  type        = string
-  default     = null
+  type        = bool
+  default     = false
 }