diff --git a/lab/us-gov-east-1/vpc/_mcmCluster/eks-karpenter/terragrunt.hcl b/lab/us-gov-east-1/vpc/_mcmCluster/eks-karpenter/terragrunt.hcl
index 6b4b8d8..a0e6592 100644
--- a/lab/us-gov-east-1/vpc/_mcmCluster/eks-karpenter/terragrunt.hcl
+++ b/lab/us-gov-east-1/vpc/_mcmCluster/eks-karpenter/terragrunt.hcl
@@ -7,7 +7,7 @@ locals {
 }
 
 terraform {
-  source = "git@github.e.it.census.gov:SCT-Engineering/tfmod-karpenter.git"
+  source = "git@github.e.it.census.gov:SCT-Engineering/tfmod-karpenter.git?ref=mcmCluster"
   extra_arguments "retry_lock" {
     commands  = get_terraform_commands_that_need_locking()
     arguments = ["-lock-timeout=20m"]