diff --git a/variables.tf b/variables.tf
index 0421677..1c58957 100644
--- a/variables.tf
+++ b/variables.tf
@@ -11,7 +11,7 @@ variable "enable_s3_endpoint" {
 
 variable "public_route_table_id" {
   description = "Public route table of the VPC where then endpoint is located"
-  type        = list(string)
+  type        = string
 }
 
 variable "private_route_table_id" {