diff --git a/modules/distribution/variables.tf b/modules/distribution/variables.tf
index ee6a414..873df04 100644
--- a/modules/distribution/variables.tf
+++ b/modules/distribution/variables.tf
@@ -215,7 +215,7 @@ variable "custom_origins" {
       (Required) `region` - The AWS Region for Origin Shield. To specify a region. For example, specify the US East (Ohio) region as `us-east-2`.
     (Optional) `connection_attempts` - The number of times that CloudFront attempts to connect to the origin, from `1` to `3`. Defaults to `3`.
     (Optional) `connection_timeout` - The number of seconds that CloudFront waits for a response from the origin, from `1` to `10`. Defaults to `10`.
-    (Optional) `keepalive_timeout` - The number of seconds that CloudFront maintains an idle connection with the origin, from `1` to `60`. Defaults to `5`.
+    (Optional) `keepalive_timeout` - The number of seconds that CloudFront maintains an idle connection with the origin, from `1` to `60`. But, the maximum can be changed arbitrarily by AWS Support to a much higher value. Defaults to `5`.
     (Optional) `response_timeout` - The number of seconds that CloudFront waits for a response from the origin, from `1` to `60`. Defaults to `30`.
   EOF
   type        = any
diff --git a/modules/distribution/versions.tf b/modules/distribution/versions.tf
index 1566320..a7d39f2 100644
--- a/modules/distribution/versions.tf
+++ b/modules/distribution/versions.tf
@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 4.27"
+      version = ">= 5.1"
     }
   }
 }