diff --git a/lambda.tf b/lambda.tf
index dcca0e5..8c0d748 100644
--- a/lambda.tf
+++ b/lambda.tf
@@ -1,7 +1,7 @@
 locals {
   source_code_repo_dir_path = "geff"
   runtime                   = "python3.8"
-  lambda_sg_ids             = length(var.lambda_security_group_ids) == 0 ? [aws_security_group.geff_lambda_sg.0.id] : var.lambda_security_group_ids
+  lambda_sg_ids             = var.deploy_lambda_in_vpc && length(var.lambda_security_group_ids) == 0 ? [aws_security_group.geff_lambda_sg.0.id] : var.lambda_security_group_ids
 }
 
 resource "aws_lambda_function" "geff_lambda" {
diff --git a/output.tf b/output.tf
index 0a3507e..7db2295 100644
--- a/output.tf
+++ b/output.tf
@@ -25,5 +25,5 @@ output "sns_topic_arn" {
 
 output "geff_lambda_sg_ids" {
   description = "Lambda SG IDs."
-  value       = length(var.lambda_security_group_ids) == 0 ? [aws_security_group.geff_lambda_sg.0.id] : var.lambda_security_group_ids
+  value       = var.deploy_lambda_in_vpc && length(var.lambda_security_group_ids) == 0 ? [aws_security_group.geff_lambda_sg.0.id] : var.lambda_security_group_ids
 }