diff --git a/README.md b/README.md
index 14443b2..72a0cea 100644
--- a/README.md
+++ b/README.md
@@ -215,6 +215,7 @@ Available targets:
 | target_group_additional_tags | The additional tags to apply to the target group | map(string) | `<map>` | no |
 | target_group_name | The name for the default target group, uses a module label name if left empty | string | `` | no |
 | target_group_port | The port for the default target group | number | `80` | no |
+| target_group_protocol | The protocol for the default target group HTTP or HTTPS | string | `HTTP` | no |
 | target_group_target_type | The type (`instance`, `ip` or `lambda`) of targets that can be registered with the target group | string | `ip` | no |
 | vpc_id | VPC ID to associate with ALB | string | - | yes |
 
diff --git a/docs/terraform.md b/docs/terraform.md
index 924b672..417c434 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -42,6 +42,7 @@
 | target_group_additional_tags | The additional tags to apply to the target group | map(string) | `<map>` | no |
 | target_group_name | The name for the default target group, uses a module label name if left empty | string | `` | no |
 | target_group_port | The port for the default target group | number | `80` | no |
+| target_group_protocol | The protocol for the default target group HTTP or HTTPS | string | `HTTP` | no |
 | target_group_target_type | The type (`instance`, `ip` or `lambda`) of targets that can be registered with the target group | string | `ip` | no |
 | vpc_id | VPC ID to associate with ALB | string | - | yes |
 
diff --git a/main.tf b/main.tf
index 5514a9e..d24313a 100644
--- a/main.tf
+++ b/main.tf
@@ -99,12 +99,13 @@ module "default_target_group_label" {
 resource "aws_lb_target_group" "default" {
   name                 = var.target_group_name == "" ? module.default_target_group_label.id : var.target_group_name
   port                 = var.target_group_port
-  protocol             = "HTTP"
+  protocol             = var.target_group_protocol
   vpc_id               = var.vpc_id
   target_type          = var.target_group_target_type
   deregistration_delay = var.deregistration_delay
 
   health_check {
+    protocol            = var.target_group_protocol
     path                = var.health_check_path
     timeout             = var.health_check_timeout
     healthy_threshold   = var.health_check_healthy_threshold
diff --git a/variables.tf b/variables.tf
index 148b24a..be13398 100644
--- a/variables.tf
+++ b/variables.tf
@@ -229,6 +229,12 @@ variable "target_group_port" {
   description = "The port for the default target group"
 }
 
+variable "target_group_protocol" {
+  type        = string
+  default     = "HTTP"
+  description = "The protocol for the default target group HTTP or HTTPS"
+}
+
 variable "target_group_name" {
   type        = string
   default     = ""