diff --git a/0-bootstrap/versions.tf b/0-bootstrap/versions.tf
index 45f2f4654..035a0143a 100644
--- a/0-bootstrap/versions.tf
+++ b/0-bootstrap/versions.tf
@@ -24,7 +24,7 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:bootstrap/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:bootstrap/v2.3.1"
   }
 
 }
diff --git a/1-org/envs/shared/versions.tf b/1-org/envs/shared/versions.tf
index 326111950..d7ff37cd0 100644
--- a/1-org/envs/shared/versions.tf
+++ b/1-org/envs/shared/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.1"
   }
 }
diff --git a/2-environments/modules/env_baseline/versions.tf b/2-environments/modules/env_baseline/versions.tf
index bd0bffb37..b45c7ad7d 100644
--- a/2-environments/modules/env_baseline/versions.tf
+++ b/2-environments/modules/env_baseline/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:org/v2.3.1"
   }
 }
diff --git a/3-networks/modules/base_shared_vpc/versions.tf b/3-networks/modules/base_shared_vpc/versions.tf
index 0b89787da..f197b0c18 100644
--- a/3-networks/modules/base_shared_vpc/versions.tf
+++ b/3-networks/modules/base_shared_vpc/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:base_shared_vpc/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:base_shared_vpc/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:base_shared_vpc/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:base_shared_vpc/v2.3.1"
   }
 }
diff --git a/3-networks/modules/dedicated_interconnect/versions.tf b/3-networks/modules/dedicated_interconnect/versions.tf
index e65ec003c..3074a3c7a 100644
--- a/3-networks/modules/dedicated_interconnect/versions.tf
+++ b/3-networks/modules/dedicated_interconnect/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:dedicated_interconnect/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:dedicated_interconnect/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:dedicated_interconnect/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:dedicated_interconnect/v2.3.1"
   }
 }
diff --git a/3-networks/modules/hierarchical_firewall_policy/versions.tf b/3-networks/modules/hierarchical_firewall_policy/versions.tf
index eaf824896..26661217c 100644
--- a/3-networks/modules/hierarchical_firewall_policy/versions.tf
+++ b/3-networks/modules/hierarchical_firewall_policy/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:hierarchical_firewall_policy/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:hierarchical_firewall_policy/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:hierarchical_firewall_policy/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:hierarchical_firewall_policy/v2.3.1"
   }
 }
diff --git a/3-networks/modules/partner_interconnect/versions.tf b/3-networks/modules/partner_interconnect/versions.tf
index 8fe61679f..652e03e44 100644
--- a/3-networks/modules/partner_interconnect/versions.tf
+++ b/3-networks/modules/partner_interconnect/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:partner_interconnect/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:partner_interconnect/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:partner_interconnect/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:partner_interconnect/v2.3.1"
   }
 }
diff --git a/3-networks/modules/restricted_shared_vpc/versions.tf b/3-networks/modules/restricted_shared_vpc/versions.tf
index 183d32f28..d6a11fbb9 100644
--- a/3-networks/modules/restricted_shared_vpc/versions.tf
+++ b/3-networks/modules/restricted_shared_vpc/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:restricted_shared_vpc/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:restricted_shared_vpc/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:restricted_shared_vpc/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:restricted_shared_vpc/v2.3.1"
   }
 }
diff --git a/3-networks/modules/transitivity/versions.tf b/3-networks/modules/transitivity/versions.tf
index e5b04661c..ebe2005cf 100644
--- a/3-networks/modules/transitivity/versions.tf
+++ b/3-networks/modules/transitivity/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:transitivity/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:transitivity/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:transitivity/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:transitivity/v2.3.1"
   }
 }
diff --git a/4-projects/modules/infra_pipelines/versions.tf b/4-projects/modules/infra_pipelines/versions.tf
index e78519e31..69f65a524 100644
--- a/4-projects/modules/infra_pipelines/versions.tf
+++ b/4-projects/modules/infra_pipelines/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:infra_pipelines/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:infra_pipelines/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:infra_pipelines/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:infra_pipelines/v2.3.1"
   }
 }
diff --git a/4-projects/modules/single_project/versions.tf b/4-projects/modules/single_project/versions.tf
index 5d90cf494..4e0a7ef00 100644
--- a/4-projects/modules/single_project/versions.tf
+++ b/4-projects/modules/single_project/versions.tf
@@ -28,10 +28,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:single_project/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:single_project/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:single_project/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:single_project/v2.3.1"
   }
 }
diff --git a/5-app-infra/modules/env_base/versions.tf b/5-app-infra/modules/env_base/versions.tf
index 7fcf2ab2d..37c35c8a0 100644
--- a/5-app-infra/modules/env_base/versions.tf
+++ b/5-app-infra/modules/env_base/versions.tf
@@ -37,10 +37,10 @@ terraform {
   }
 
   provider_meta "google" {
-    module_name = "blueprints/terraform/terraform-example-foundation:app_env_base/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:app_env_base/v2.3.1"
   }
 
   provider_meta "google-beta" {
-    module_name = "blueprints/terraform/terraform-example-foundation:app_env_base/v2.3.0"
+    module_name = "blueprints/terraform/terraform-example-foundation:app_env_base/v2.3.1"
   }
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c7a35250..246208d4a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [2.3.1](https://www.github.com/terraform-google-modules/terraform-example-foundation/compare/v2.3.0...v2.3.1) (2021-10-15)
+
+
+### Bug Fixes
+
+* upgrade cloud router module version ([#559](https://www.github.com/terraform-google-modules/terraform-example-foundation/issues/559)) ([b67e62a](https://www.github.com/terraform-google-modules/terraform-example-foundation/commit/b67e62adf5e7431209a02dc4b70c3d793db5c6eb))
+
 ## [2.3.0](https://www.github.com/terraform-google-modules/terraform-example-foundation/compare/v2.2.0...v2.3.0) (2021-09-02)