diff --git a/modules/gcp/master-igm/iam.tf b/modules/gcp/master-igm/iam.tf
index d69f692481..d5e537c994 100644
--- a/modules/gcp/master-igm/iam.tf
+++ b/modules/gcp/master-igm/iam.tf
@@ -1,5 +1,5 @@
 resource "google_service_account" "master-node-sa" {
-  account_id   = "${var.cluster_name}-master-node"
+  account_id   = "${format("%.28s", var.cluster_name)}-m"
   display_name = "Master node"
 }
 
diff --git a/modules/gcp/worker-igm/iam.tf b/modules/gcp/worker-igm/iam.tf
index 99516f9b2a..955912004d 100644
--- a/modules/gcp/worker-igm/iam.tf
+++ b/modules/gcp/worker-igm/iam.tf
@@ -1,5 +1,5 @@
 resource "google_service_account" "worker-node-sa" {
-  account_id   = "${var.cluster_name}-worker-node"
+  account_id   = "${format("%.28s", var.cluster_name)}-w"
   display_name = "Worker node"
 }