diff --git a/README.md b/README.md
index 8acffcf..b35fc9a 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ Functional examples are included in the [examples](./examples/) directory. By de
 | name | Name of the router | `string` | n/a | yes |
 | nats | NATs to deploy on this router. | <pre>list(object({<br>    name                                = string<br>    nat_ip_allocate_option              = optional(string)<br>    source_subnetwork_ip_ranges_to_nat  = optional(string)<br>    nat_ips                             = optional(list(string), [])<br>    drain_nat_ips                       = optional(list(string), [])<br>    min_ports_per_vm                    = optional(number)<br>    max_ports_per_vm                    = optional(number)<br>    udp_idle_timeout_sec                = optional(number)<br>    icmp_idle_timeout_sec               = optional(number)<br>    tcp_established_idle_timeout_sec    = optional(number)<br>    tcp_transitory_idle_timeout_sec     = optional(number)<br>    tcp_time_wait_timeout_sec           = optional(number)<br>    enable_endpoint_independent_mapping = optional(bool)<br>    enable_dynamic_port_allocation      = optional(bool)<br><br>    log_config = optional(object({<br>      enable = optional(bool, true)<br>      filter = optional(string, "ALL")<br>    }), {})<br><br>    subnetworks = optional(list(object({<br>      name                     = string<br>      source_ip_ranges_to_nat  = list(string)<br>      secondary_ip_range_names = optional(list(string))<br>    })), [])<br><br>  }))</pre> | `[]` | no |
 | network | A reference to the network to which this router belongs | `string` | n/a | yes |
-| project | The project ID to deploy to | `string` | n/a | yes |
+| project\_id | The project ID to deploy to | `string` | n/a | yes |
 | region | Region where the router resides | `string` | n/a | yes |
 
 ## Outputs
diff --git a/docs/upgrading_to_v8.0.md b/docs/upgrading_to_v8.0.md
new file mode 100644
index 0000000..e588519
--- /dev/null
+++ b/docs/upgrading_to_v8.0.md
@@ -0,0 +1,9 @@
+# Upgrading to v8.0
+
+The v8.0 release contains backwards-incompatible changes.
+
+### [`project` variable](https://github.com/terraform-google-modules/terraform-google-cloud-router/blob/v7.4.0/variables.tf#L25) renamed to `project_id`
+
+To align with the standard naming conventions, the `project` input variable has been renamed to `project_id`. This change applies to the main module and submodule (`interface`).
+
+To upgrade, module calls must be updated to use the `project_id` argument and the version constraint must be updated to `~> 8.0`.
diff --git a/examples/interconnect_attachment/main.tf b/examples/interconnect_attachment/main.tf
index 7f4b32c..78a7431 100644
--- a/examples/interconnect_attachment/main.tf
+++ b/examples/interconnect_attachment/main.tf
@@ -15,11 +15,10 @@
  */
 
 module "cloud_router" {
-  source  = "terraform-google-modules/cloud-router/google"
-  version = "~> 7.0"
+  source = "../.."
 
   name    = "example-router"
-  project = "example-project"
+  project_id = "example-project"
   network = "default"
   region  = "us-central1"
 
diff --git a/examples/nat/main.tf b/examples/nat/main.tf
index 658c652..31848da 100644
--- a/examples/nat/main.tf
+++ b/examples/nat/main.tf
@@ -41,12 +41,12 @@ module "vpc" {
 
 # [START cloudnat_simple_create]
 module "cloud_router" {
-  source  = "terraform-google-modules/cloud-router/google"
-  version = "~> 7.0"
-  name    = "my-cloud-router"
-  project = var.project_id
-  network = module.vpc.network_name
-  region  = "us-central1"
+  source = "../.."
+
+  name       = "my-cloud-router"
+  project_id = var.project_id
+  network    = module.vpc.network_name
+  region     = "us-central1"
 
   nats = [{
     name                               = "my-nat-gateway"
diff --git a/examples/simple_example/main.tf b/examples/simple_example/main.tf
index 091c49f..d9322db 100644
--- a/examples/simple_example/main.tf
+++ b/examples/simple_example/main.tf
@@ -27,8 +27,7 @@ module "vpc" {
 
 # [START cloudrouter_create]
 module "cloud_router" {
-  source  = "terraform-google-modules/cloud-router/google"
-  version = "~> 7.0"
+  source = "../.."
 
   name   = "my-router"
   region = "us-central1"
@@ -39,7 +38,7 @@ module "cloud_router" {
     asn = "65001"
   }
 
-  project = var.project_id
-  network = module.vpc.network_name
+  project_id = var.project_id
+  network    = module.vpc.network_name
 }
 # [END cloudrouter_create]
diff --git a/main.tf b/main.tf
index 09aab19..c368415 100644
--- a/main.tf
+++ b/main.tf
@@ -18,7 +18,7 @@ resource "google_compute_router" "router" {
   name                          = var.name
   network                       = var.network
   region                        = var.region
-  project                       = var.project
+  project                       = var.project_id
   description                   = var.description
   encrypted_interconnect_router = var.encrypted_interconnect_router
 
diff --git a/metadata.display.yaml b/metadata.display.yaml
index 6616364..530ca63 100644
--- a/metadata.display.yaml
+++ b/metadata.display.yaml
@@ -47,9 +47,9 @@ spec:
         network:
           name: network
           title: Network
-        project:
-          name: project
-          title: Project
+        project_id:
+          name: project_id
+          title: Project_Id
         region:
           name: region
           title: Region
diff --git a/metadata.yaml b/metadata.yaml
index d9d0799..29e38f2 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -20,6 +20,7 @@ metadata:
     config.kubernetes.io/local-config: "true"
 spec:
   info:
+    title: "Cloud Router"
     title: "Cloud Router"
     source:
       repo: https://github.com/terraform-google-modules/terraform-google-cloud-router.git
@@ -55,20 +56,20 @@ spec:
         connections:
           - source:
               source: github.com/terraform-google-modules/terraform-google-network
-              version: ">= 11.0.0"
+              version: ">= 12.0.0"
             spec:
               outputExpr: network_name
           - source:
               source: github.com/terraform-google-modules/terraform-google-network//modules/vpc
-              version: ">= 11.0.0"
+              version: ">= 12.0.0"
             spec:
               outputExpr: network_name
           - source:
               source: github.com/GoogleCloudPlatform/terraform-google-vpn
-              version: ">= 5.0.0"
+              version: ">= 6.1.0"
             spec:
               outputExpr: network
-      - name: project
+      - name: project_id
         description: The project ID to deploy to
         varType: string
         required: true
diff --git a/modules/interconnect_attachment/main.tf b/modules/interconnect_attachment/main.tf
index 1c151f4..9b6f224 100644
--- a/modules/interconnect_attachment/main.tf
+++ b/modules/interconnect_attachment/main.tf
@@ -37,7 +37,7 @@ module "interface" {
 
   source                  = "../interface"
   name                    = try(var.interface.name, null)
-  project                 = var.project
+  project_id              = var.project
   router                  = var.router
   region                  = var.region
   ip_range                = google_compute_interconnect_attachment.attachment.cloud_router_ip_address
diff --git a/modules/interface/README.md b/modules/interface/README.md
index fbc8234..654e0ce 100644
--- a/modules/interface/README.md
+++ b/modules/interface/README.md
@@ -9,7 +9,7 @@
 | ip\_range | IP address and range of the interface | `string` | `null` | no |
 | name | The name of the interface | `string` | n/a | yes |
 | peers | BGP peers for this interface. | <pre>list(object({<br>    name                           = string<br>    peer_ip_address                = string<br>    peer_asn                       = string<br>    advertised_route_priority      = optional(number)<br>    zero_advertised_route_priority = optional(bool)<br>    bfd = object({<br>      session_initialization_mode = string<br>      min_transmit_interval       = optional(number)<br>      min_receive_interval        = optional(number)<br>      multiplier                  = optional(number)<br>    })<br>    md5_authentication_key = optional(object({<br>      name = string<br>      key  = string<br>    }))<br>  }))</pre> | `[]` | no |
-| project | The project ID to deploy to | `string` | n/a | yes |
+| project\_id | The project ID to deploy to | `string` | n/a | yes |
 | region | Region where the interface resides | `string` | n/a | yes |
 | router | Name of the router the interface resides | `string` | n/a | yes |
 | vpn\_tunnel | The name or resource link to the VPN tunnel this interface will be linked to | `string` | `null` | no |
diff --git a/modules/interface/main.tf b/modules/interface/main.tf
index 43428df..69cd022 100644
--- a/modules/interface/main.tf
+++ b/modules/interface/main.tf
@@ -16,7 +16,7 @@
 
 resource "google_compute_router_interface" "interface" {
   name                    = var.name
-  project                 = var.project
+  project                 = var.project_id
   router                  = var.router
   region                  = var.region
   ip_range                = var.ip_range
diff --git a/modules/interface/metadata.display.yaml b/modules/interface/metadata.display.yaml
index 009c2b2..1620a82 100644
--- a/modules/interface/metadata.display.yaml
+++ b/modules/interface/metadata.display.yaml
@@ -42,9 +42,9 @@ spec:
         peers:
           name: peers
           title: Peers
-        project:
-          name: project
-          title: Project
+        project_id:
+          name: project_id
+          title: Project_Id
         region:
           name: region
           title: Region
diff --git a/modules/interface/metadata.yaml b/modules/interface/metadata.yaml
index 17afb5f..a8904a1 100644
--- a/modules/interface/metadata.yaml
+++ b/modules/interface/metadata.yaml
@@ -44,7 +44,7 @@ spec:
         description: The name of the interface
         varType: string
         required: true
-      - name: project
+      - name: project_id
         description: The project ID to deploy to
         varType: string
         required: true
@@ -55,17 +55,17 @@ spec:
         connections:
           - source:
               source: github.com/terraform-google-modules/terraform-google-cloud-router
-              version: ">= 7.0.0"
+              version: ">= 7.4.0"
             spec:
               outputExpr: router.name
           - source:
               source: github.com/terraform-google-modules/terraform-google-cloud-nat
-              version: ">= 4.0.0"
+              version: ">= 5.4.0"
             spec:
               outputExpr: router_name
           - source:
               source: github.com/terraform-google-modules/terraform-google-vpn//modules/vpn-ha
-              version: ">= 5.0.0"
+              version: ">= 6.1.0"
             spec:
               outputExpr: router_name
       - name: region
@@ -79,14 +79,9 @@ spec:
         description: The name or resource link to the VPN tunnel this interface will be linked to
         varType: string
         connections:
-          - source:
-              source: github.com/terraform-google-modules/terraform-google-vpn//modules/vpn-ha
-              version: ">= 5.0.0"
-            spec:
-              outputExpr: values(tunnel_self_links)[0]
           - source:
               source: github.com/terraform-google-modules/terraform-google-vpn
-              version: ">= 5.0.0"
+              version: ">= 6.1.0"
             spec:
               outputExpr: vpn_tunnels_self_link-dynamic[0]
       - name: interconnect_attachment
diff --git a/modules/interface/variables.tf b/modules/interface/variables.tf
index 7d90fc0..2c68aec 100644
--- a/modules/interface/variables.tf
+++ b/modules/interface/variables.tf
@@ -19,7 +19,7 @@ variable "name" {
   description = "The name of the interface"
 }
 
-variable "project" {
+variable "project_id" {
   type        = string
   description = "The project ID to deploy to"
 }
diff --git a/variables.tf b/variables.tf
index 9f5e203..f7a5134 100644
--- a/variables.tf
+++ b/variables.tf
@@ -24,7 +24,7 @@ variable "network" {
   description = "A reference to the network to which this router belongs"
 }
 
-variable "project" {
+variable "project_id" {
   type        = string
   description = "The project ID to deploy to"
 }