diff --git a/README.md b/README.md
index 5fd2514b..9ed4468f 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ module "memorystore" {
 | read\_replicas\_mode | Read replicas mode. https://cloud.google.com/memorystore/docs/redis/reference/rest/v1/projects.locations.instances#readreplicasmode | `string` | `"READ_REPLICAS_DISABLED"` | no |
 | redis\_configs | The Redis configuration parameters. See [more details](https://cloud.google.com/memorystore/docs/redis/reference/rest/v1/projects.locations.instances#Instance.FIELDS.redis_configs) | `map(any)` | `{}` | no |
 | redis\_version | The version of Redis software. | `string` | `null` | no |
-| region | The GCP region to use. | `string` | `null` | no |
+| region | The GCP region to use. | `string` | n/a | yes |
 | replica\_count | The number of replicas. | `number` | `null` | no |
 | reserved\_ip\_range | The CIDR range of internal addresses that are reserved for this instance. | `string` | `null` | no |
 | secondary\_ip\_range | Optional. Additional IP range for node placement. Required when enabling read replicas on an existing instance. | `string` | `null` | no |
diff --git a/docs/upgrading_to_v13.0.md b/docs/upgrading_to_v13.0.md
index 0b13bd11..d90f2aaa 100644
--- a/docs/upgrading_to_v13.0.md
+++ b/docs/upgrading_to_v13.0.md
@@ -2,6 +2,22 @@
 
 The v13.0 release contains backwards-incompatible changes.
 
+## Explicitly provide region as input
+
+```diff
+module "memorystore" {
+  source  = "terraform-google-modules/memorystore/google"
+  version = "~> 13.0"
+
+  name           = "memorystore"
+  project_id     = "memorystore"
+  memory_size_gb = "1"
+  enable_apis    = "true"
++ region         = "us-central1"
+}
+
+```
+
 ## Replace uses of apphub_service_uri
 
 This release removes apphub_service_uri output. You can replace use of `apphub_service_uri` by forming the desired output as below,
diff --git a/examples/basic/memorystore.tf b/examples/basic/memorystore.tf
index e257f3d7..8b15da6f 100644
--- a/examples/basic/memorystore.tf
+++ b/examples/basic/memorystore.tf
@@ -22,4 +22,5 @@ module "memorystore" {
   project_id     = "memorystore"
   memory_size_gb = "1"
   enable_apis    = "true"
+  region         = "us-central1"
 }
diff --git a/metadata.display.yaml b/metadata.display.yaml
index 930a9aa7..dd080bda 100644
--- a/metadata.display.yaml
+++ b/metadata.display.yaml
@@ -72,9 +72,9 @@ spec:
         persistence_config:
           name: persistence_config
           title: Persistence Config
-        project:
-          name: project
-          title: Project
+        project_id:
+          name: project_id
+          title: Project Id
         read_replicas_mode:
           name: read_replicas_mode
           title: Read Replicas Mode
@@ -84,11 +84,20 @@ spec:
         redis_version:
           name: redis_version
           title: Redis Version
+          enumValueLabels:
+            - label: REDIS_5_0
+              value: REDIS_5_0
+            - label: REDIS_6_X
+              value: REDIS_6_X
+            - label: REDIS_7_0
+              value: REDIS_7_0
           level: 1
+          altDefaults:
+            - type: ALTERNATE_TYPE_DC
+              value: REDIS_7_0
         region:
           name: region
           title: Region
-          level: 1
         replica_count:
           name: replica_count
           title: Replica Count
@@ -102,12 +111,12 @@ spec:
         tier:
           name: tier
           title: Tier
-          level: 1
           enumValueLabels:
             - label: STANDARD_HA
               value: STANDARD_HA
             - label: BASIC
               value: BASIC
+          level: 1
         transit_encryption_mode:
           name: transit_encryption_mode
           title: Transit Encryption Mode
diff --git a/metadata.yaml b/metadata.yaml
index eeeefee7..a7b30204 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -59,6 +59,7 @@ spec:
       - name: region
         description: The GCP region to use.
         varType: string
+        required: true
       - name: name
         description: The ID of the instance or a fully qualified identifier for the instance.
         varType: string
diff --git a/variables.tf b/variables.tf
index 923f8198..a9395e70 100644
--- a/variables.tf
+++ b/variables.tf
@@ -22,7 +22,6 @@ variable "project_id" {
 variable "region" {
   description = "The GCP region to use."
   type        = string
-  default     = null
 }
 
 variable "name" {