diff --git a/main.tf b/main.tf
index 401d33c..6493fd7 100644
--- a/main.tf
+++ b/main.tf
@@ -73,7 +73,7 @@ resource "aws_sns_topic_subscription" "sns_notify_slack" {
 
   topic_arn           = local.sns_topic_arn
   protocol            = "lambda"
-  endpoint            = module.lambda.lambda_function_qualified_arn
+  endpoint            = module.lambda.lambda_function_arn
   filter_policy       = var.subscription_filter_policy
   filter_policy_scope = var.subscription_filter_policy_scope
 }