diff --git a/CHANGELOG.md b/CHANGELOG.md
index aacffc4..68d51d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.1.0](https://www.github.com/terraform-google-modules/terraform-google-org-policy/compare/v5.0.0...v5.1.0) (2021-12-20)
+
+
+### Features
+
+* update TPG version constraints to allow 4.0 ([#52](https://www.github.com/terraform-google-modules/terraform-google-org-policy/issues/52)) ([2d39ed9](https://www.github.com/terraform-google-modules/terraform-google-org-policy/commit/2d39ed989b09841aacc738121d0909f5e94efa22))
+
 ## [5.0.0](https://www.github.com/terraform-google-modules/terraform-google-org-policy/compare/v4.0.0...v5.0.0) (2021-03-19)
 
 
diff --git a/modules/bucket_policy_only/versions.tf b/modules/bucket_policy_only/versions.tf
index 5af3fd0..8f8271f 100644
--- a/modules/bucket_policy_only/versions.tf
+++ b/modules/bucket_policy_only/versions.tf
@@ -25,7 +25,7 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-google-org-policy:bucket_policy_only/v5.0.0"
+    module_name = "blueprints/terraform/terraform-google-org-policy:bucket_policy_only/v5.1.0"
   }
 
 }
diff --git a/modules/domain_restricted_sharing/versions.tf b/modules/domain_restricted_sharing/versions.tf
index b5a1676..e3f0289 100644
--- a/modules/domain_restricted_sharing/versions.tf
+++ b/modules/domain_restricted_sharing/versions.tf
@@ -25,7 +25,7 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-google-org-policy:domain_restricted_sharing/v5.0.0"
+    module_name = "blueprints/terraform/terraform-google-org-policy:domain_restricted_sharing/v5.1.0"
   }
 
 }
diff --git a/modules/restrict_vm_external_ips/versions.tf b/modules/restrict_vm_external_ips/versions.tf
index a20e577..65aa516 100644
--- a/modules/restrict_vm_external_ips/versions.tf
+++ b/modules/restrict_vm_external_ips/versions.tf
@@ -25,7 +25,7 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-google-org-policy:restrict_vm_external_ips/v5.0.0"
+    module_name = "blueprints/terraform/terraform-google-org-policy:restrict_vm_external_ips/v5.1.0"
   }
 
 }
diff --git a/modules/skip_default_network/versions.tf b/modules/skip_default_network/versions.tf
index 8a250f4..be32126 100644
--- a/modules/skip_default_network/versions.tf
+++ b/modules/skip_default_network/versions.tf
@@ -25,7 +25,7 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-google-org-policy:skip_default_network/v5.0.0"
+    module_name = "blueprints/terraform/terraform-google-org-policy:skip_default_network/v5.1.0"
   }
 
 }
diff --git a/versions.tf b/versions.tf
index 6788bc2..a29dd55 100644
--- a/versions.tf
+++ b/versions.tf
@@ -25,7 +25,7 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-google-org-policy/v5.0.0"
+    module_name = "blueprints/terraform/terraform-google-org-policy/v5.1.0"
   }
 
 }