diff --git a/variables.tf b/variables.tf
index 104a327..9c590d5 100644
--- a/variables.tf
+++ b/variables.tf
@@ -4,7 +4,7 @@ variable "aws_region" {
 }
 
 variable "site_domains" {
-  type        = list(any)
+  type        = list(string)
   description = "The domain name of these sites, which will be mapped over"
 }