diff --git a/custom/README.md b/custom/README.md
index 3d229d2..b8be5e6 100644
--- a/custom/README.md
+++ b/custom/README.md
@@ -98,7 +98,7 @@ No modules.
 | <a name="input_egress_security_groups"></a> [egress\_security\_groups](#input\_egress\_security\_groups) | List of egress security groups (all ports) | `list(string)` | `[]` | no |
 | <a name="input_enable_self"></a> [enable\_self](#input\_enable\_self) | Enable\|Disable self full access | `bool` | `false` | no |
 | <a name="input_ingress_networks"></a> [ingress\_networks](#input\_ingress\_networks) | List of ingress networks for access (with all pre-defined ingress ports) | `list(string)` | `[]` | no |
-| <a name="input_ingress_port_list"></a> [ingress\_port\_list](#input\_ingress\_port\_list) | Ingress port list of 5-tuple: from, to, proto, description, and cidr(list) | `list(tuple(number, number, any, string, list))` | `[]` | no |
+| <a name="input_ingress_port_list"></a> [ingress\_port\_list](#input\_ingress\_port\_list) | Ingress port list of 5-tuple: from, to, proto, description, and cidr(list) | `list(tuple([number, number, any, string, list]))` | `[]` | no |
 | <a name="input_ingress_port_map"></a> [ingress\_port\_map](#input\_ingress\_port\_map) | Ingress port list of objects: from, to, proto, description and cidr(list) | <pre>list(object({<br>    from        = number<br>    to          = number<br>    proto       = any<br>    description = string<br>    cidr        = list(string)<br>  }))</pre> | `[]` | no |
 | <a name="input_ingress_security_groups"></a> [ingress\_security\_groups](#input\_ingress\_security\_groups) | List of ingress security groups for all ports | `list(string)` | `[]` | no |
 | <a name="input_name"></a> [name](#input\_name) | Security Group Name (required) | `string` | n/a | yes |
diff --git a/custom/variables.tf b/custom/variables.tf
index 7aae9ae..256628a 100644
--- a/custom/variables.tf
+++ b/custom/variables.tf
@@ -18,7 +18,7 @@ variable "short_description" {
 
 variable "ingress_port_list" {
   description = "Ingress port list of 5-tuple: from, to, proto, description, and cidr(list)"
-  type        = list(tuple(number, number, any, string, list))
+  type        = list(tuple([number, number, any, string, list]))
   default     = []
 }