diff --git a/1-bootstrap/README.md b/1-bootstrap/README.md
index dbf19adb..96fca3ed 100644
--- a/1-bootstrap/README.md
+++ b/1-bootstrap/README.md
@@ -81,7 +81,7 @@ If you receive any errors or made any changes to the Terraform config or `terraf
 | artifacts\_bucket | Bucket for storing TF plans |
 | logs\_bucket | Bucket for storing TF logs |
 | project\_id | Project ID |
-| source\_repo\_urls | n/a |
+| source\_repo\_urls | Source repository URLs |
 | state\_bucket | Bucket for storing TF state |
 
 <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
diff --git a/1-bootstrap/outputs.tf b/1-bootstrap/outputs.tf
index 58c6ee52..6a77ae22 100644
--- a/1-bootstrap/outputs.tf
+++ b/1-bootstrap/outputs.tf
@@ -35,5 +35,6 @@ output "logs_bucket" {
 }
 
 output "source_repo_urls" {
-  value = { for repo_id, repo in google_sourcerepo_repository.gcp_repo : repo_id => "https://source.developers.google.com/p/${var.project_id}/r/${repo.name}" }
+  description = "Source repository URLs"
+  value       = { for repo_id, repo in google_sourcerepo_repository.gcp_repo : repo_id => "https://source.developers.google.com/p/${var.project_id}/r/${repo.name}" }
 }
diff --git a/2-multitenant/modules/env_baseline/versions.tf b/2-multitenant/modules/env_baseline/versions.tf
index ebf5b706..c7bf27f3 100644
--- a/2-multitenant/modules/env_baseline/versions.tf
+++ b/2-multitenant/modules/env_baseline/versions.tf
@@ -19,10 +19,12 @@ terraform {
 
   required_providers {
     google = {
-      source = "hashicorp/google"
+      source  = "hashicorp/google"
+      version = ">= 5, < 6"
     }
     google-beta = {
-      source = "hashicorp/google-beta"
+      source  = "hashicorp/google-beta"
+      version = ">= 5, < 6"
     }
   }
 
diff --git a/3-appfactory/modules/app-group-baseline/versions.tf b/3-appfactory/modules/app-group-baseline/versions.tf
index 1fed8aba..12e77fda 100644
--- a/3-appfactory/modules/app-group-baseline/versions.tf
+++ b/3-appfactory/modules/app-group-baseline/versions.tf
@@ -19,10 +19,12 @@ terraform {
 
   required_providers {
     google = {
-      source = "hashicorp/google"
+      source  = "hashicorp/google"
+      version = ">= 5, < 6"
     }
     google-beta = {
-      source = "hashicorp/google-beta"
+      source  = "hashicorp/google-beta"
+      version = ">= 5, < 6"
     }
   }
 
diff --git a/4-fleetscope/modules/env_baseline/versions.tf b/4-fleetscope/modules/env_baseline/versions.tf
index 473a046f..15c0dfc5 100644
--- a/4-fleetscope/modules/env_baseline/versions.tf
+++ b/4-fleetscope/modules/env_baseline/versions.tf
@@ -17,6 +17,21 @@
 terraform {
   required_version = ">= 0.13"
 
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = ">= 5, < 6"
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = ">= 5, < 6"
+    }
+    random = {
+      source  = "hashicorp/random"
+      version = ">= 3"
+    }
+  }
+
   provider_meta "google" {
     module_name = "blueprints/terraform/terraform-google-enterprise-application:environments/v0.1.0"
   }