diff --git a/template_s3/cloudfront.tf b/template_s3/cloudfront.tf
index 6708c4e..1c90785 100644
--- a/template_s3/cloudfront.tf
+++ b/template_s3/cloudfront.tf
@@ -12,7 +12,7 @@ resource "aws_cloudfront_distribution" "cloudfront" {
   default_root_object = var.cloudfront_default_root_object
   http_version        = var.cloudfront_http_version
  
-  aliases = var.cdn_domain
+  aliases = [var.cdn_domain]
   origin {
     origin_id                = aws_s3_bucket.bucket.id
     origin_access_control_id = aws_cloudfront_origin_access_control.cloudfront_acl.id