diff --git a/README.md b/README.md
index 2506a45..6843169 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+
 <!-- markdownlint-disable -->
 # terraform-aws-sns-lambda-notify-slack
 
@@ -31,7 +32,6 @@
 
 Terraform module to provision a lambda function that subscribes to SNS and notifies to Slack.
 
-
 ---
 
 This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps.
@@ -62,7 +62,6 @@ We literally have [*hundreds of terraform modules*][terraform_modules] that are
 
 
 
-
 ## Security & Compliance [<img src="https://cloudposse.com/wp-content/uploads/2020/11/bridgecrew.svg" width="250" align="right" />](https://bridgecrew.io/)
 
 Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.
@@ -118,24 +117,24 @@ module "notify_slack" {
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.13.0 |
-| archive | >=1.3 |
-| aws | >= 2.0 |
-| local | >= 1.3 |
-| null | >= 2.0 |
-| template | >= 2.0 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 0.13.0 |
+| <a name="requirement_archive"></a> [archive](#requirement\_archive) | >=1.3 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 2.0 |
+| <a name="requirement_local"></a> [local](#requirement\_local) | >= 1.3 |
+| <a name="requirement_null"></a> [null](#requirement\_null) | >= 2.0 |
+| <a name="requirement_template"></a> [template](#requirement\_template) | >= 2.0 |
 
 ## Providers
 
-No provider.
+No providers.
 
 ## Modules
 
 | Name | Source | Version |
 |------|--------|---------|
-| default_label | cloudposse/label/null | 0.22.1 |
-| notify_slack | terraform-aws-modules/notify-slack/aws | 4.12 |
-| this | cloudposse/label/null | 0.24.1 |
+| <a name="module_default_label"></a> [default\_label](#module\_default\_label) | cloudposse/label/null | 0.25.0 |
+| <a name="module_notify_slack"></a> [notify\_slack](#module\_notify\_slack) | terraform-aws-modules/notify-slack/aws | 4.12 |
+| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.24.1 |
 
 ## Resources
 
@@ -145,42 +144,42 @@ No resources.
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
-| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
-| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
-| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
-| create\_sns\_topic | Whether to create new SNS topic | `bool` | `true` | no |
-| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
-| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
-| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
-| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
-| kms\_key\_arn | ARN of the KMS key used for decrypting slack webhook url | `string` | `""` | no |
-| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
-| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
-| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
-| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
-| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
-| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
-| slack\_channel | The name of the channel in Slack for notifications | `string` | n/a | yes |
-| slack\_emoji | A custom emoji that will appear on Slack messages | `string` | `":aws:"` | no |
-| slack\_username | The username that will appear on Slack messages | `string` | n/a | yes |
-| slack\_webhook\_url | The URL of Slack webhook | `string` | n/a | yes |
-| sns\_topic\_name | Name of the SNS topic to subscribe to. | `string` | `""` | no |
-| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
-| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
+| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
+| <a name="input_attributes"></a> [attributes](#input\_attributes) | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
+| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
+| <a name="input_create_sns_topic"></a> [create\_sns\_topic](#input\_create\_sns\_topic) | Whether to create new SNS topic | `bool` | `true` | no |
+| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
+| <a name="input_environment"></a> [environment](#input\_environment) | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
+| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
+| <a name="input_kms_key_arn"></a> [kms\_key\_arn](#input\_kms\_key\_arn) | ARN of the KMS key used for decrypting slack webhook url | `string` | `""` | no |
+| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
+| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
+| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_name"></a> [name](#input\_name) | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
+| <a name="input_namespace"></a> [namespace](#input\_namespace) | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
+| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<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_slack_channel"></a> [slack\_channel](#input\_slack\_channel) | The name of the channel in Slack for notifications | `string` | n/a | yes |
+| <a name="input_slack_emoji"></a> [slack\_emoji](#input\_slack\_emoji) | A custom emoji that will appear on Slack messages | `string` | `":aws:"` | no |
+| <a name="input_slack_username"></a> [slack\_username](#input\_slack\_username) | The username that will appear on Slack messages | `string` | n/a | yes |
+| <a name="input_slack_webhook_url"></a> [slack\_webhook\_url](#input\_slack\_webhook\_url) | The URL of Slack webhook | `string` | n/a | yes |
+| <a name="input_sns_topic_name"></a> [sns\_topic\_name](#input\_sns\_topic\_name) | Name of the SNS topic to subscribe to. | `string` | `""` | no |
+| <a name="input_stage"></a> [stage](#input\_stage) | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
 
 ## Outputs
 
 | Name | Description |
 |------|-------------|
-| lambda\_cloudwatch\_log\_group\_arn | The Amazon Resource Name (ARN) specifying the log group |
-| lambda\_iam\_role\_arn | The ARN of the IAM role used by Lambda function |
-| lambda\_iam\_role\_name | The name of the IAM role used by Lambda function |
-| notify\_slack\_lambda\_function\_arn | The ARN of the Lambda function |
-| notify\_slack\_lambda\_function\_invoke\_arn | The ARN to be used for invoking Lambda function from API Gateway |
-| notify\_slack\_lambda\_function\_last\_modified | The date Lambda function was last modified |
-| notify\_slack\_lambda\_function\_name | The name of the Lambda function |
-| notify\_slack\_lambda\_function\_version | Latest published version of your Lambda function |
-| slack\_topic\_arn | The ARN of the SNS topic from which messages will be sent to Slack |
+| <a name="output_lambda_cloudwatch_log_group_arn"></a> [lambda\_cloudwatch\_log\_group\_arn](#output\_lambda\_cloudwatch\_log\_group\_arn) | The Amazon Resource Name (ARN) specifying the log group |
+| <a name="output_lambda_iam_role_arn"></a> [lambda\_iam\_role\_arn](#output\_lambda\_iam\_role\_arn) | The ARN of the IAM role used by Lambda function |
+| <a name="output_lambda_iam_role_name"></a> [lambda\_iam\_role\_name](#output\_lambda\_iam\_role\_name) | The name of the IAM role used by Lambda function |
+| <a name="output_notify_slack_lambda_function_arn"></a> [notify\_slack\_lambda\_function\_arn](#output\_notify\_slack\_lambda\_function\_arn) | The ARN of the Lambda function |
+| <a name="output_notify_slack_lambda_function_invoke_arn"></a> [notify\_slack\_lambda\_function\_invoke\_arn](#output\_notify\_slack\_lambda\_function\_invoke\_arn) | The ARN to be used for invoking Lambda function from API Gateway |
+| <a name="output_notify_slack_lambda_function_last_modified"></a> [notify\_slack\_lambda\_function\_last\_modified](#output\_notify\_slack\_lambda\_function\_last\_modified) | The date Lambda function was last modified |
+| <a name="output_notify_slack_lambda_function_name"></a> [notify\_slack\_lambda\_function\_name](#output\_notify\_slack\_lambda\_function\_name) | The name of the Lambda function |
+| <a name="output_notify_slack_lambda_function_version"></a> [notify\_slack\_lambda\_function\_version](#output\_notify\_slack\_lambda\_function\_version) | Latest published version of your Lambda function |
+| <a name="output_slack_topic_arn"></a> [slack\_topic\_arn](#output\_slack\_topic\_arn) | The ARN of the SNS topic from which messages will be sent to Slack |
 <!-- markdownlint-restore -->
 
 
@@ -192,6 +191,7 @@ Like this project? Please give it a ★ on [our GitHub](https://github.com/cloud
 Are you using this project or any of our other projects? Consider [leaving a testimonial][testimonial]. =)
 
 
+
 ## Related Projects
 
 Check out these related projects.
@@ -204,8 +204,6 @@ Check out these related projects.
 - [terraform-aws-rds-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-rds-cloudwatch-sns-alarms) - Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic
 - [terraform-aws-sqs-cloudwatch-sns-alarms](https://github.com/cloudposse/terraform-aws-sqs-cloudwatch-sns-alarms) - Terraform module for creating alarms for SQS and notifying endpoints
 
-
-
 ## Help
 
 **Got a question?** We got answers.
diff --git a/docs/terraform.md b/docs/terraform.md
index fc25039..776fc5c 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -3,24 +3,24 @@
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.13.0 |
-| archive | >=1.3 |
-| aws | >= 2.0 |
-| local | >= 1.3 |
-| null | >= 2.0 |
-| template | >= 2.0 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 0.13.0 |
+| <a name="requirement_archive"></a> [archive](#requirement\_archive) | >=1.3 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 2.0 |
+| <a name="requirement_local"></a> [local](#requirement\_local) | >= 1.3 |
+| <a name="requirement_null"></a> [null](#requirement\_null) | >= 2.0 |
+| <a name="requirement_template"></a> [template](#requirement\_template) | >= 2.0 |
 
 ## Providers
 
-No provider.
+No providers.
 
 ## Modules
 
 | Name | Source | Version |
 |------|--------|---------|
-| default_label | cloudposse/label/null | 0.22.1 |
-| notify_slack | terraform-aws-modules/notify-slack/aws | 4.12 |
-| this | cloudposse/label/null | 0.24.1 |
+| <a name="module_default_label"></a> [default\_label](#module\_default\_label) | cloudposse/label/null | 0.25.0 |
+| <a name="module_notify_slack"></a> [notify\_slack](#module\_notify\_slack) | terraform-aws-modules/notify-slack/aws | 4.12 |
+| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.24.1 |
 
 ## Resources
 
@@ -30,40 +30,40 @@ No resources.
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
-| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
-| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
-| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
-| create\_sns\_topic | Whether to create new SNS topic | `bool` | `true` | no |
-| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
-| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
-| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
-| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
-| kms\_key\_arn | ARN of the KMS key used for decrypting slack webhook url | `string` | `""` | no |
-| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
-| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
-| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
-| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
-| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
-| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
-| slack\_channel | The name of the channel in Slack for notifications | `string` | n/a | yes |
-| slack\_emoji | A custom emoji that will appear on Slack messages | `string` | `":aws:"` | no |
-| slack\_username | The username that will appear on Slack messages | `string` | n/a | yes |
-| slack\_webhook\_url | The URL of Slack webhook | `string` | n/a | yes |
-| sns\_topic\_name | Name of the SNS topic to subscribe to. | `string` | `""` | no |
-| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
-| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
+| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
+| <a name="input_attributes"></a> [attributes](#input\_attributes) | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
+| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
+| <a name="input_create_sns_topic"></a> [create\_sns\_topic](#input\_create\_sns\_topic) | Whether to create new SNS topic | `bool` | `true` | no |
+| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
+| <a name="input_environment"></a> [environment](#input\_environment) | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
+| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
+| <a name="input_kms_key_arn"></a> [kms\_key\_arn](#input\_kms\_key\_arn) | ARN of the KMS key used for decrypting slack webhook url | `string` | `""` | no |
+| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
+| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
+| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_name"></a> [name](#input\_name) | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
+| <a name="input_namespace"></a> [namespace](#input\_namespace) | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
+| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<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_slack_channel"></a> [slack\_channel](#input\_slack\_channel) | The name of the channel in Slack for notifications | `string` | n/a | yes |
+| <a name="input_slack_emoji"></a> [slack\_emoji](#input\_slack\_emoji) | A custom emoji that will appear on Slack messages | `string` | `":aws:"` | no |
+| <a name="input_slack_username"></a> [slack\_username](#input\_slack\_username) | The username that will appear on Slack messages | `string` | n/a | yes |
+| <a name="input_slack_webhook_url"></a> [slack\_webhook\_url](#input\_slack\_webhook\_url) | The URL of Slack webhook | `string` | n/a | yes |
+| <a name="input_sns_topic_name"></a> [sns\_topic\_name](#input\_sns\_topic\_name) | Name of the SNS topic to subscribe to. | `string` | `""` | no |
+| <a name="input_stage"></a> [stage](#input\_stage) | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
 
 ## Outputs
 
 | Name | Description |
 |------|-------------|
-| lambda\_cloudwatch\_log\_group\_arn | The Amazon Resource Name (ARN) specifying the log group |
-| lambda\_iam\_role\_arn | The ARN of the IAM role used by Lambda function |
-| lambda\_iam\_role\_name | The name of the IAM role used by Lambda function |
-| notify\_slack\_lambda\_function\_arn | The ARN of the Lambda function |
-| notify\_slack\_lambda\_function\_invoke\_arn | The ARN to be used for invoking Lambda function from API Gateway |
-| notify\_slack\_lambda\_function\_last\_modified | The date Lambda function was last modified |
-| notify\_slack\_lambda\_function\_name | The name of the Lambda function |
-| notify\_slack\_lambda\_function\_version | Latest published version of your Lambda function |
-| slack\_topic\_arn | The ARN of the SNS topic from which messages will be sent to Slack |
+| <a name="output_lambda_cloudwatch_log_group_arn"></a> [lambda\_cloudwatch\_log\_group\_arn](#output\_lambda\_cloudwatch\_log\_group\_arn) | The Amazon Resource Name (ARN) specifying the log group |
+| <a name="output_lambda_iam_role_arn"></a> [lambda\_iam\_role\_arn](#output\_lambda\_iam\_role\_arn) | The ARN of the IAM role used by Lambda function |
+| <a name="output_lambda_iam_role_name"></a> [lambda\_iam\_role\_name](#output\_lambda\_iam\_role\_name) | The name of the IAM role used by Lambda function |
+| <a name="output_notify_slack_lambda_function_arn"></a> [notify\_slack\_lambda\_function\_arn](#output\_notify\_slack\_lambda\_function\_arn) | The ARN of the Lambda function |
+| <a name="output_notify_slack_lambda_function_invoke_arn"></a> [notify\_slack\_lambda\_function\_invoke\_arn](#output\_notify\_slack\_lambda\_function\_invoke\_arn) | The ARN to be used for invoking Lambda function from API Gateway |
+| <a name="output_notify_slack_lambda_function_last_modified"></a> [notify\_slack\_lambda\_function\_last\_modified](#output\_notify\_slack\_lambda\_function\_last\_modified) | The date Lambda function was last modified |
+| <a name="output_notify_slack_lambda_function_name"></a> [notify\_slack\_lambda\_function\_name](#output\_notify\_slack\_lambda\_function\_name) | The name of the Lambda function |
+| <a name="output_notify_slack_lambda_function_version"></a> [notify\_slack\_lambda\_function\_version](#output\_notify\_slack\_lambda\_function\_version) | Latest published version of your Lambda function |
+| <a name="output_slack_topic_arn"></a> [slack\_topic\_arn](#output\_slack\_topic\_arn) | The ARN of the SNS topic from which messages will be sent to Slack |
 <!-- markdownlint-restore -->
diff --git a/main.tf b/main.tf
index cd2aba9..6726f34 100644
--- a/main.tf
+++ b/main.tf
@@ -1,6 +1,6 @@
 module "default_label" {
   source     = "cloudposse/label/null"
-  version    = "0.22.1"
+  version    = "0.25.0"
   attributes = concat(module.this.attributes, ["default"])
   context    = module.this.context
 }