diff --git a/main.tf b/main.tf
index a221ba9..9c10c87 100644
--- a/main.tf
+++ b/main.tf
@@ -85,10 +85,9 @@ resource "aws_iam_group" "audit" {
 # group membership
 #---
 resource "aws_iam_group_membership" "audit" {
-  for_each = aws_iam_user.audit
-  name     = var.group
-  group    = aws_iam_group.audit.name
-  users    = each.value.name
+  name  = var.group
+  group = aws_iam_group.audit.name
+  users = [for a in aws_iam_user.audit : a.name]
 }
 
 #---