diff --git a/scaling/main.tf b/scaling/main.tf
index e61a35a..1e5d314 100644
--- a/scaling/main.tf
+++ b/scaling/main.tf
@@ -11,7 +11,7 @@ resource "aws_cloudwatch_metric_alarm" "alarm_down" {
   datapoints_to_alarm = var.datapoints_to_alarm_down
 
   dimensions = {
-    "${var.dimension_name}" = coalesce(var.dimension_value, var.autoscaling_group_names[count.index])
+    (var.dimension_name) = coalesce(var.dimension_value, var.autoscaling_group_names[count.index])
   }
 
   alarm_description = "This metric monitors CPU utilization down"
@@ -31,7 +31,7 @@ resource "aws_cloudwatch_metric_alarm" "alarm_up" {
   datapoints_to_alarm = var.datapoints_to_alarm_up
 
   dimensions = {
-    "${var.dimension_name}" = coalesce(var.dimension_value, var.autoscaling_group_names[count.index])
+    (var.dimension_name) = coalesce(var.dimension_value, var.autoscaling_group_names[count.index])
   }
 
   alarm_description = "This metric monitors CPU utilization up"
diff --git a/scaling/versions.tf b/scaling/versions.tf
index d9b6f79..8058b64 100644
--- a/scaling/versions.tf
+++ b/scaling/versions.tf
@@ -1,3 +1,3 @@
 terraform {
-  required_version = ">= 0.12"
+  required_version = "~> 0.14"
 }