diff --git a/README.md b/README.md
index 0ba3fc1..c9b0ecf 100644
--- a/README.md
+++ b/README.md
@@ -217,10 +217,10 @@ Available targets:
 | <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br>set as tag values, and output by this module individually.<br>Does not affect values of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br>Default value: `lower`. | `string` | `null` | no |
 | <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br>Default is to include all labels.<br>Tags with empty values will not be included in the `tags` output.<br>Set to `[]` to suppress all generated tags.<br>**Notes:**<br>  The value of the `name` tag, if included, will be the `id`, not the `name`.<br>  Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br>  changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br>  "default"<br>]</pre> | no |
 | <a name="input_maintenance_window"></a> [maintenance\_window](#input\_maintenance\_window) | Maintenance window | `string` | `"wed:03:00-wed:04:00"` | no |
-| <a name="input_max_item_size"></a> [max\_item\_size](#input\_max\_item\_size) | Max item size | `number` | `10485760` | no |
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_notification_topic_arn"></a> [notification\_topic\_arn](#input\_notification\_topic\_arn) | Notification topic arn | `string` | `""` | no |
+| <a name="input_parameter"></a> [parameter](#input\_parameter) | A list of Memcached parameters to apply. Note that parameters may differ from one Memcached family to another | <pre>list(object({<br>    name  = string<br>    value = string<br>  }))</pre> | <pre>[<br>  {<br>    "name": "max_item_size",<br>    "value": 10485760<br>  }<br>]</pre> | no |
 | <a name="input_port"></a> [port](#input\_port) | Memcached port | `number` | `11211` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_security_group_create_before_destroy"></a> [security\_group\_create\_before\_destroy](#input\_security\_group\_create\_before\_destroy) | Set `true` to enable Terraform `create_before_destroy` behavior on the created security group.<br>We only recommend setting this `false` if you are upgrading this module and need to keep<br>the existing security group from being replaced.<br>Note that changing this value will always cause the security group to be replaced. | `bool` | `true` | no |
diff --git a/docs/terraform.md b/docs/terraform.md
index e63d993..ad8c286 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -74,10 +74,10 @@
 | <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br>set as tag values, and output by this module individually.<br>Does not affect values of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br>Default value: `lower`. | `string` | `null` | no |
 | <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br>Default is to include all labels.<br>Tags with empty values will not be included in the `tags` output.<br>Set to `[]` to suppress all generated tags.<br>**Notes:**<br>  The value of the `name` tag, if included, will be the `id`, not the `name`.<br>  Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br>  changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br>  "default"<br>]</pre> | no |
 | <a name="input_maintenance_window"></a> [maintenance\_window](#input\_maintenance\_window) | Maintenance window | `string` | `"wed:03:00-wed:04:00"` | no |
-| <a name="input_max_item_size"></a> [max\_item\_size](#input\_max\_item\_size) | Max item size | `number` | `10485760` | no |
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_notification_topic_arn"></a> [notification\_topic\_arn](#input\_notification\_topic\_arn) | Notification topic arn | `string` | `""` | no |
+| <a name="input_parameter"></a> [parameter](#input\_parameter) | A list of Memcached parameters to apply. Note that parameters may differ from one Memcached family to another | <pre>list(object({<br>    name  = string<br>    value = string<br>  }))</pre> | <pre>[<br>  {<br>    "name": "max_item_size",<br>    "value": 10485760<br>  }<br>]</pre> | no |
 | <a name="input_port"></a> [port](#input\_port) | Memcached port | `number` | `11211` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_security_group_create_before_destroy"></a> [security\_group\_create\_before\_destroy](#input\_security\_group\_create\_before\_destroy) | Set `true` to enable Terraform `create_before_destroy` behavior on the created security group.<br>We only recommend setting this `false` if you are upgrading this module and need to keep<br>the existing security group from being replaced.<br>Note that changing this value will always cause the security group to be replaced. | `bool` | `true` | no |
diff --git a/main.tf b/main.tf
index f45c60b..e43302f 100644
--- a/main.tf
+++ b/main.tf
@@ -94,9 +94,12 @@ resource "aws_elasticache_parameter_group" "default" {
   name   = module.this.id
   family = var.elasticache_parameter_group_family
 
-  parameter {
-    name  = "max_item_size"
-    value = var.max_item_size
+  dynamic "parameter" {
+    for_each = var.elasticache_parameters
+    content {
+      name  = parameter.value.name
+      value = tostring(parameter.value.value)
+    }
   }
 }
 
diff --git a/variables.tf b/variables.tf
index 105193d..77322d6 100644
--- a/variables.tf
+++ b/variables.tf
@@ -4,12 +4,6 @@ variable "vpc_id" {
   description = "VPC ID"
 }
 
-variable "max_item_size" {
-  type        = number
-  default     = 10485760
-  description = "Max item size"
-}
-
 variable "subnets" {
   type        = list(string)
   default     = []
@@ -118,6 +112,20 @@ variable "elasticache_parameter_group_family" {
   default     = "memcached1.5"
 }
 
+variable "elasticache_parameters" {
+  type = list(object({
+    name  = string
+    value = string
+  }))
+  default = [
+    {
+      name  = "max_item_size"
+      value = 10485760
+    },
+  ]
+  description = "A list of ElastiCache parameters to apply. Note that parameters may differ from one ElastiCache family to another"
+}
+
 variable "cloudwatch_metric_alarms_enabled" {
   type        = bool
   description = "Boolean flag to enable/disable CloudWatch metrics alarms"