diff --git a/.terraform-version b/.terraform-version
index 845639e..9faa1b7 100644
--- a/.terraform-version
+++ b/.terraform-version
@@ -1 +1 @@
-0.1.4
+0.1.5
diff --git a/variables.tf b/variables.tf
index 730bf0a..6d8961c 100644
--- a/variables.tf
+++ b/variables.tf
@@ -16,8 +16,8 @@ variable "virtual_desktop_application_group_name" {
   nullable    = false
 
   validation {
-    condition     = can(regex("^[a-z0-9-]{3,24}$", var.virtual_desktop_application_group_name))
-    error_message = "The name must be between 3 and 24 characters long and can only contain lowercase letters, numbers and dashes."
+    condition     = can(regex("^[a-z0-9-]{3,64}$", var.virtual_desktop_application_group_name))
+    error_message = "The name must be between 3 and 64 characters long and can only contain Alphanumerics, underscores, periods, and hyphens. Start with letter or number. End with letter, number, or underscore."
   }
 }