diff --git a/modules/aws-rds-aurora/sql-server.tf b/modules/aws-rds-aurora/sql-server.tf
index 7c4ad6d..d536e1a 100644
--- a/modules/aws-rds-aurora/sql-server.tf
+++ b/modules/aws-rds-aurora/sql-server.tf
@@ -270,8 +270,9 @@ resource "aws_db_parameter_group" "sql_server" {
   dynamic "parameter" {
     for_each = var.enable_custom_parameter_group ? var.parameter_group : []
     content {
-      name  = parameter.value.parameter_name
-      value = parameter.value.parameter_value
+      name         = parameter.value.parameter_name
+      value        = parameter.value.parameter_value
+      apply_method = parameter.value.parameter_apply_method
     }
   }
 }
diff --git a/modules/aws-rds-aurora/variables.tf b/modules/aws-rds-aurora/variables.tf
index 53549ca..2f41b1b 100644
--- a/modules/aws-rds-aurora/variables.tf
+++ b/modules/aws-rds-aurora/variables.tf
@@ -552,8 +552,9 @@ variable "option_group" {
 
 variable "parameter_group" {
   type = list(object({
-    parameter_name  = string
-    parameter_value = any
+    parameter_name         = string
+    parameter_value        = any
+    parameter_apply_method = string
   }))
 }
 
@@ -785,4 +786,4 @@ variable "kms_multi_region" {
   description = "Determine whether the KMS key is multi region support"
   type        = bool
   default     = false
-}
\ No newline at end of file
+}