diff --git a/aws/fedora-coreos/kubernetes/bootstrap.tf b/aws/fedora-coreos/kubernetes/bootstrap.tf
index 0864e0dc2..0a325e125 100644
--- a/aws/fedora-coreos/kubernetes/bootstrap.tf
+++ b/aws/fedora-coreos/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name          = var.cluster_name
   api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/aws/fedora-coreos/kubernetes/versions.tf b/aws/fedora-coreos/kubernetes/versions.tf
index e6bad8ed5..09738df4e 100644
--- a/aws/fedora-coreos/kubernetes/versions.tf
+++ b/aws/fedora-coreos/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     aws      = ">= 2.23, <= 4.0"
     template = "~> 2.1"
diff --git a/aws/fedora-coreos/kubernetes/workers/versions.tf b/aws/fedora-coreos/kubernetes/workers/versions.tf
index 630359910..851bf859b 100644
--- a/aws/fedora-coreos/kubernetes/workers/versions.tf
+++ b/aws/fedora-coreos/kubernetes/workers/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     aws      = ">= 2.23, <= 4.0"
     template = "~> 2.1"
diff --git a/aws/flatcar-linux/kubernetes/bootstrap.tf b/aws/flatcar-linux/kubernetes/bootstrap.tf
index ef91d723d..ab4b0cf96 100644
--- a/aws/flatcar-linux/kubernetes/bootstrap.tf
+++ b/aws/flatcar-linux/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name          = var.cluster_name
   api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/aws/flatcar-linux/kubernetes/versions.tf b/aws/flatcar-linux/kubernetes/versions.tf
index e6bad8ed5..09738df4e 100644
--- a/aws/flatcar-linux/kubernetes/versions.tf
+++ b/aws/flatcar-linux/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     aws      = ">= 2.23, <= 4.0"
     template = "~> 2.1"
diff --git a/aws/flatcar-linux/kubernetes/workers/versions.tf b/aws/flatcar-linux/kubernetes/workers/versions.tf
index 630359910..851bf859b 100644
--- a/aws/flatcar-linux/kubernetes/workers/versions.tf
+++ b/aws/flatcar-linux/kubernetes/workers/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     aws      = ">= 2.23, <= 4.0"
     template = "~> 2.1"
diff --git a/azure/fedora-coreos/kubernetes/bootstrap.tf b/azure/fedora-coreos/kubernetes/bootstrap.tf
index 35fdd7b6c..cf7dd941c 100644
--- a/azure/fedora-coreos/kubernetes/bootstrap.tf
+++ b/azure/fedora-coreos/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name = var.cluster_name
   api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/azure/fedora-coreos/kubernetes/versions.tf b/azure/fedora-coreos/kubernetes/versions.tf
index f137e25ca..083d1c4ec 100644
--- a/azure/fedora-coreos/kubernetes/versions.tf
+++ b/azure/fedora-coreos/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     azurerm  = "~> 2.8"
     template = "~> 2.1"
diff --git a/azure/fedora-coreos/kubernetes/workers/versions.tf b/azure/fedora-coreos/kubernetes/workers/versions.tf
index dc46111f7..bed7fdf6c 100644
--- a/azure/fedora-coreos/kubernetes/workers/versions.tf
+++ b/azure/fedora-coreos/kubernetes/workers/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     azurerm  = "~> 2.8"
     template = "~> 2.1"
diff --git a/azure/flatcar-linux/kubernetes/bootstrap.tf b/azure/flatcar-linux/kubernetes/bootstrap.tf
index a7602bb32..ee728d7b5 100644
--- a/azure/flatcar-linux/kubernetes/bootstrap.tf
+++ b/azure/flatcar-linux/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name = var.cluster_name
   api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/azure/flatcar-linux/kubernetes/versions.tf b/azure/flatcar-linux/kubernetes/versions.tf
index f137e25ca..083d1c4ec 100644
--- a/azure/flatcar-linux/kubernetes/versions.tf
+++ b/azure/flatcar-linux/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     azurerm  = "~> 2.8"
     template = "~> 2.1"
diff --git a/azure/flatcar-linux/kubernetes/workers/versions.tf b/azure/flatcar-linux/kubernetes/workers/versions.tf
index dc46111f7..bed7fdf6c 100644
--- a/azure/flatcar-linux/kubernetes/workers/versions.tf
+++ b/azure/flatcar-linux/kubernetes/workers/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     azurerm  = "~> 2.8"
     template = "~> 2.1"
diff --git a/bare-metal/fedora-coreos/kubernetes/bootstrap.tf b/bare-metal/fedora-coreos/kubernetes/bootstrap.tf
index 7ba850435..3b18f201d 100644
--- a/bare-metal/fedora-coreos/kubernetes/bootstrap.tf
+++ b/bare-metal/fedora-coreos/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name                    = var.cluster_name
   api_servers                     = [var.k8s_domain_name]
diff --git a/bare-metal/fedora-coreos/kubernetes/versions.tf b/bare-metal/fedora-coreos/kubernetes/versions.tf
index c61399118..bcc9e57c1 100644
--- a/bare-metal/fedora-coreos/kubernetes/versions.tf
+++ b/bare-metal/fedora-coreos/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/bare-metal/flatcar-linux/kubernetes/bootstrap.tf b/bare-metal/flatcar-linux/kubernetes/bootstrap.tf
index 62eede92c..187089fd7 100644
--- a/bare-metal/flatcar-linux/kubernetes/bootstrap.tf
+++ b/bare-metal/flatcar-linux/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name                    = var.cluster_name
   api_servers                     = [var.k8s_domain_name]
diff --git a/bare-metal/flatcar-linux/kubernetes/versions.tf b/bare-metal/flatcar-linux/kubernetes/versions.tf
index 5773a7b2b..24553877d 100644
--- a/bare-metal/flatcar-linux/kubernetes/versions.tf
+++ b/bare-metal/flatcar-linux/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/digital-ocean/fedora-coreos/kubernetes/bootstrap.tf b/digital-ocean/fedora-coreos/kubernetes/bootstrap.tf
index 6759ced38..ab819befc 100644
--- a/digital-ocean/fedora-coreos/kubernetes/bootstrap.tf
+++ b/digital-ocean/fedora-coreos/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name = var.cluster_name
   api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/digital-ocean/fedora-coreos/kubernetes/versions.tf b/digital-ocean/fedora-coreos/kubernetes/versions.tf
index ddae14cf0..b90fdabe3 100644
--- a/digital-ocean/fedora-coreos/kubernetes/versions.tf
+++ b/digital-ocean/fedora-coreos/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/digital-ocean/flatcar-linux/kubernetes/bootstrap.tf b/digital-ocean/flatcar-linux/kubernetes/bootstrap.tf
index 1e17081f8..5b7216a0d 100644
--- a/digital-ocean/flatcar-linux/kubernetes/bootstrap.tf
+++ b/digital-ocean/flatcar-linux/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name = var.cluster_name
   api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/digital-ocean/flatcar-linux/kubernetes/versions.tf b/digital-ocean/flatcar-linux/kubernetes/versions.tf
index ddae14cf0..b90fdabe3 100644
--- a/digital-ocean/flatcar-linux/kubernetes/versions.tf
+++ b/digital-ocean/flatcar-linux/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/docs/fedora-coreos/aws.md b/docs/fedora-coreos/aws.md
index 50f32681d..95dc563ff 100644
--- a/docs/fedora-coreos/aws.md
+++ b/docs/fedora-coreos/aws.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/fedora-coreos/azure.md b/docs/fedora-coreos/azure.md
index 8518d3b8b..15dfeb556 100644
--- a/docs/fedora-coreos/azure.md
+++ b/docs/fedora-coreos/azure.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/fedora-coreos/bare-metal.md b/docs/fedora-coreos/bare-metal.md
index 15979e17e..d427654ac 100644
--- a/docs/fedora-coreos/bare-metal.md
+++ b/docs/fedora-coreos/bare-metal.md
@@ -111,7 +111,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/fedora-coreos/digitalocean.md b/docs/fedora-coreos/digitalocean.md
index 16bcf376e..144e1a3c4 100644
--- a/docs/fedora-coreos/digitalocean.md
+++ b/docs/fedora-coreos/digitalocean.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/fedora-coreos/google-cloud.md b/docs/fedora-coreos/google-cloud.md
index c56de3d8d..7fd62f7ae 100644
--- a/docs/fedora-coreos/google-cloud.md
+++ b/docs/fedora-coreos/google-cloud.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/flatcar-linux/aws.md b/docs/flatcar-linux/aws.md
index 180b7a543..785848d61 100644
--- a/docs/flatcar-linux/aws.md
+++ b/docs/flatcar-linux/aws.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/flatcar-linux/azure.md b/docs/flatcar-linux/azure.md
index f211834dc..6a18726d8 100644
--- a/docs/flatcar-linux/azure.md
+++ b/docs/flatcar-linux/azure.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/flatcar-linux/bare-metal.md b/docs/flatcar-linux/bare-metal.md
index c0d0e4bda..d5f7852c2 100644
--- a/docs/flatcar-linux/bare-metal.md
+++ b/docs/flatcar-linux/bare-metal.md
@@ -111,7 +111,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/flatcar-linux/digitalocean.md b/docs/flatcar-linux/digitalocean.md
index 53e2c08ce..7e91ac8f3 100644
--- a/docs/flatcar-linux/digitalocean.md
+++ b/docs/flatcar-linux/digitalocean.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/flatcar-linux/google-cloud.md b/docs/flatcar-linux/google-cloud.md
index c2d0302e1..78f765efd 100644
--- a/docs/flatcar-linux/google-cloud.md
+++ b/docs/flatcar-linux/google-cloud.md
@@ -18,7 +18,7 @@ Install [Terraform](https://www.terraform.io/downloads.html) v0.13.0+ on your sy
 
 ```sh
 $ terraform version
-Terraform v0.13.0
+Terraform v0.15.0
 ```
 
 Read [concepts](/architecture/concepts/) to learn about Terraform, modules, and organizing resources. Change to your infrastructure repository (e.g. `infra`).
diff --git a/docs/topics/maintenance.md b/docs/topics/maintenance.md
index e6290fdef..8a1ad2419 100644
--- a/docs/topics/maintenance.md
+++ b/docs/topics/maintenance.md
@@ -197,8 +197,9 @@ Typhoon modules have been updated for v0.13.x, but retain compatibility with v0.
 
 | Typhoon Release   | Terraform version   |
 |-------------------|---------------------|
-| v1.21.0 - ?       | v0.13.x, v0.14.4+   |
-| v1.20.0 - v1.21.0 | v0.13.x             |
+| v1.21.1 - ?       | v0.13.x, v0.14.4+, v0.15.0 |
+| v1.20.2 - v1.21.0 | v0.13.x, v0.14.4+   |
+| v1.20.0 - v1.20.2 | v0.13.x             |
 | v1.18.8 - v1.19.4 | v0.12.26+, v0.13.x  |
 | v1.15.0 - v1.18.8 | v0.12.x             |
 | v1.10.3 - v1.15.0 | v0.11.x             |
diff --git a/google-cloud/fedora-coreos/kubernetes/bootstrap.tf b/google-cloud/fedora-coreos/kubernetes/bootstrap.tf
index 2cc462d91..0331c2a03 100644
--- a/google-cloud/fedora-coreos/kubernetes/bootstrap.tf
+++ b/google-cloud/fedora-coreos/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name          = var.cluster_name
   api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/google-cloud/fedora-coreos/kubernetes/versions.tf b/google-cloud/fedora-coreos/kubernetes/versions.tf
index 68aae846f..a0c6a1701 100644
--- a/google-cloud/fedora-coreos/kubernetes/versions.tf
+++ b/google-cloud/fedora-coreos/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     google   = ">= 2.19, < 4.0"
     template = "~> 2.1"
diff --git a/google-cloud/fedora-coreos/kubernetes/workers/versions.tf b/google-cloud/fedora-coreos/kubernetes/workers/versions.tf
index 85dc2d3df..1b31217f0 100644
--- a/google-cloud/fedora-coreos/kubernetes/workers/versions.tf
+++ b/google-cloud/fedora-coreos/kubernetes/workers/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     google   = ">= 2.19, < 4.0"
     template = "~> 2.1"
diff --git a/google-cloud/flatcar-linux/kubernetes/bootstrap.tf b/google-cloud/flatcar-linux/kubernetes/bootstrap.tf
index f0dd467db..e25f38892 100644
--- a/google-cloud/flatcar-linux/kubernetes/bootstrap.tf
+++ b/google-cloud/flatcar-linux/kubernetes/bootstrap.tf
@@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=a4ecf168df1673288f067b9c5966037fe2d3b5ae"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f8fd2f8912455ecef1f54c282e81a60a3da91548"
 
   cluster_name          = var.cluster_name
   api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
diff --git a/google-cloud/flatcar-linux/kubernetes/versions.tf b/google-cloud/flatcar-linux/kubernetes/versions.tf
index 68aae846f..a0c6a1701 100644
--- a/google-cloud/flatcar-linux/kubernetes/versions.tf
+++ b/google-cloud/flatcar-linux/kubernetes/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     google   = ">= 2.19, < 4.0"
     template = "~> 2.1"
diff --git a/google-cloud/flatcar-linux/kubernetes/workers/versions.tf b/google-cloud/flatcar-linux/kubernetes/workers/versions.tf
index 85dc2d3df..1b31217f0 100644
--- a/google-cloud/flatcar-linux/kubernetes/workers/versions.tf
+++ b/google-cloud/flatcar-linux/kubernetes/workers/versions.tf
@@ -1,7 +1,7 @@
 # Terraform version and plugin versions
 
 terraform {
-  required_version = ">= 0.13.0, < 0.15.0"
+  required_version = ">= 0.13.0, < 0.16.0"
   required_providers {
     google   = ">= 2.19, < 4.0"
     template = "~> 2.1"