diff --git a/README.md b/README.md
index 0058fa1..3ffef0a 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,10 @@
-# AWS Auto Scaling Group (ASG) Terraform module
+# Caution before using this module
+
+- Forked from [`terraform-aws-autoscale`](https://registry.terraform.io/modules/terraform-aws-modules/autoscaling/aws/latest)!  
+- Origin Version is `v7.2.0`, now.  
+- Just Added: ignoring `target_group_arns`  
+
+## AWS Auto Scaling Group (ASG) Terraform module
 
 Terraform module which creates Auto Scaling resources on AWS.
 
diff --git a/main.tf b/main.tf
index 496294c..c1299d2 100644
--- a/main.tf
+++ b/main.tf
@@ -869,7 +869,7 @@ resource "aws_autoscaling_group" "idc" {
 
   lifecycle {
     create_before_destroy = true
-    ignore_changes        = [desired_capacity]
+    ignore_changes        = [desired_capacity, target_group_arns]
   }
 }