diff --git a/emr/README.md b/emr/README.md
index f1623ad..45667c2 100644
--- a/emr/README.md
+++ b/emr/README.md
@@ -13,13 +13,12 @@ security groups, with the proper interrelationships, as follows:
 
 ```hcl
 module "emr" {
-  source = "git@github.e.it.census.gov:terraform-modules/aws-common-security-groups.git//emr"
+  source = "git@github.e.it.census.gov:terraform-modules/aws-common-security-groups.git//emr?ref=tf-upgrade"
 
-  vpc_id = var.vpc_id
+  vpc_id      = var.vpc_id
   name_prefix = "edl-dev-124567"
   ## optional
   # ingress_prefix_list_names = [ "onprem-networks.core" ]
-  # egress_prefix_list_names = [ ]
 
   ## tags for Name, CostAllocation, and Environment are pre-set, but they can be overriden
   # tags = { }
diff --git a/emr/main.tf b/emr/main.tf
index 19d14aa..2e1ca8b 100644
--- a/emr/main.tf
+++ b/emr/main.tf
@@ -14,13 +14,12 @@
 *
 * ```hcl
 * module "emr" {
-*   source = "git@github.e.it.census.gov:terraform-modules/aws-common-security-groups.git//emr"
+*   source = "git@github.e.it.census.gov:terraform-modules/aws-common-security-groups.git//emr?ref=tf-upgrade"
 *
-*   vpc_id = var.vpc_id
+*   vpc_id      = var.vpc_id
 *   name_prefix = "edl-dev-124567"
 *   ## optional
 *   # ingress_prefix_list_names = [ "onprem-networks.core" ]
-*   # egress_prefix_list_names = [ ]
 *
 *   ## tags for Name, CostAllocation, and Environment are pre-set, but they can be overriden
 *   # tags = { }
diff --git a/examples/emr-security-group.tf b/examples/emr-security-group.tf
new file mode 100644
index 0000000..cd791e4
--- /dev/null
+++ b/examples/emr-security-group.tf
@@ -0,0 +1,7 @@
+module "emr" {
+  source = "git@github.e.it.census.gov:terraform-modules/aws-common-security-groups.git//emr?ref=tf-upgrade"
+
+  vpc_id                    = var.vpc_id
+  name_prefix               = "edl-dev-124567"
+  ingress_prefix_list_names = ["onprem-networks.core"]
+}