diff --git a/compute_mig_resize_request/main.tf b/compute_mig_resize_request/main.tf
index 991671d4..3425f9c7 100644
--- a/compute_mig_resize_request/main.tf
+++ b/compute_mig_resize_request/main.tf
@@ -12,7 +12,7 @@ resource "google_compute_region_instance_template" "a3_dws" {
   }
 
   disk {
-    source_image = "cos-cloud/cos-105-lts"
+    source_image = "cos-cloud/cos-121-lts"
     auto_delete  = true
     boot         = true
     disk_type    = "pd-ssd"