diff --git a/README.md b/README.md
index 6843169..efcc102 100644
--- a/README.md
+++ b/README.md
@@ -133,7 +133,7 @@ No providers.
 | Name | Source | Version |
 |------|--------|---------|
 | <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_notify_slack"></a> [notify\_slack](#module\_notify\_slack) | terraform-aws-modules/notify-slack/aws | 4.18 |
 | <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.24.1 |
 
 ## Resources
diff --git a/docs/terraform.md b/docs/terraform.md
index 776fc5c..4f935fa 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -19,7 +19,7 @@ No providers.
 | Name | Source | Version |
 |------|--------|---------|
 | <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_notify_slack"></a> [notify\_slack](#module\_notify\_slack) | terraform-aws-modules/notify-slack/aws | 4.18 |
 | <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.24.1 |
 
 ## Resources
diff --git a/main.tf b/main.tf
index 6726f34..2c8500d 100644
--- a/main.tf
+++ b/main.tf
@@ -7,7 +7,7 @@ module "default_label" {
 
 module "notify_slack" {
   source               = "terraform-aws-modules/notify-slack/aws"
-  version              = "4.12"
+  version              = "4.18"
   create               = module.this.enabled
   create_sns_topic     = var.create_sns_topic
   lambda_function_name = module.default_label.id