diff --git a/ois-scanner/main.tf b/ois-scanner/main.tf
index 29ac197..99bfc3a 100644
--- a/ois-scanner/main.tf
+++ b/ois-scanner/main.tf
@@ -34,30 +34,32 @@ locals {
 }
 
 resource "aws_security_group" "this_security_group" {
-  name = "${var.name}"
-  description = "${local.description}"
-  vpc_id = "${var.vpc_id}"
+  name        = var.name
+  description = local.description
+  vpc_id      = var.vpc_id
 
   ingress {
     description = "ALL: ${local.description}"
-    from_port = 0
-    to_port   = 0
-    protocol  = -1
-    cidr_blocks = "${local.ipv4_cidr}"
+    from_port   = 0
+    to_port     = 0
+    protocol    = -1
+    cidr_blocks = local.ipv4_cidr
   }
 
   egress {
     description = "ALL: ${local.description}"
-    from_port = 0
-    to_port   = 0
-    protocol  = -1
-    cidr_blocks = [ "0.0.0.0/0" ]
+    from_port   = 0
+    to_port     = 0
+    protocol    = -1
+    cidr_blocks = ["0.0.0.0/0"]
   }
 
-  tags = "${merge(
-    map("Name", "sg-${var.name}"),
+  tags = merge(
+    {
+      "Name" = "sg-${var.name}"
+    },
     var.tags,
-    )}"
+  )
 }
 
 # - site: bcc
diff --git a/ois-scanner/output.tf b/ois-scanner/output.tf
index 9e3bc1c..b7b3536 100644
--- a/ois-scanner/output.tf
+++ b/ois-scanner/output.tf
@@ -1,9 +1,10 @@
 output "this_security_group_id" {
   description = "Created security group ID"
-  value = "${aws_security_group.this_security_group.id}"
+  value       = aws_security_group.this_security_group.id
 }
 
 output "this_security_group_arn" {
   description = "Created security group ARN"
-  value = "${aws_security_group.this_security_group.arn}"
+  value       = aws_security_group.this_security_group.arn
 }
+
diff --git a/ois-scanner/variables.tf b/ois-scanner/variables.tf
index bef1644..423b238 100644
--- a/ois-scanner/variables.tf
+++ b/ois-scanner/variables.tf
@@ -4,15 +4,16 @@ variable "vpc_id" {
 
 variable "name" {
   description = "Security group Name"
-  default = "ois-scanner"
+  default     = "ois-scanner"
 }
 
 variable "tags" {
   description = "Extra security group tags"
 
-  type    = "map"
-  default = { 
+  type = map(string)
+  default = {
     "CostAllocation" = "csvd:infrastructure"
-    "Environment" = "csvd-infrastructure"
+    "Environment"    = "csvd-infrastructure"
   }
 }
+
diff --git a/ois-scanner/versions.tf b/ois-scanner/versions.tf
new file mode 100644
index 0000000..ac97c6a
--- /dev/null
+++ b/ois-scanner/versions.tf
@@ -0,0 +1,4 @@
+
+terraform {
+  required_version = ">= 0.12"
+}
diff --git a/rds-mssql/main.tf b/rds-mssql/main.tf
index 36b6bb6..049c795 100644
--- a/rds-mssql/main.tf
+++ b/rds-mssql/main.tf
@@ -34,7 +34,7 @@ resource "aws_security_group" "this_security_group" {
     for_each = local.ports
     iterator = p
     content {
-      description = "${local.description}"
+      description = local.description
       from_port = p.value[0]
       to_port   = p.value[1]
       protocol  = p.value[2]
@@ -53,5 +53,5 @@ resource "aws_security_group" "this_security_group" {
   tags = merge(
     map("Name", local.name),
     var.tags,
-    )
+  )
 }
diff --git a/rds-mssql/versions.tf b/rds-mssql/versions.tf
new file mode 100644
index 0000000..ac97c6a
--- /dev/null
+++ b/rds-mssql/versions.tf
@@ -0,0 +1,4 @@
+
+terraform {
+  required_version = ">= 0.12"
+}