diff --git a/CHANGES.md b/CHANGES.md
index c78fb03c..fbd214d4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -7,7 +7,6 @@ Notable changes between versions.
 * Kubernetes [v1.20.0](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md#v1200)
 * Add input variable validations ([#880](https://github.com/poseidon/typhoon/pull/880))
   * Require Terraform v0.13+ ([migration guide](https://typhoon.psdn.io/topics/maintenance/#terraform-versions))
-* Support Terraform v0.13.x and v0.14.x ([#905](https://github.com/poseidon/typhoon/pull/905))
 * Set output sensitive to suppress console display for some cases ([#885](https://github.com/poseidon/typhoon/pull/885))
 * Add service account token [volume projection](https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/#service-account-token-volume-projection) ([#897](https://github.com/poseidon/typhoon/pull/897))
 * Scope kube-scheduler and kube-controller-manager permissions ([#898](https://github.com/poseidon/typhoon/pull/898))
diff --git a/aws/fedora-coreos/kubernetes/versions.tf b/aws/fedora-coreos/kubernetes/versions.tf
index 38af1942..0ec41c2f 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"
   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 7f883f63..73e42fa7 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"
   required_providers {
     aws      = ">= 2.23, <= 4.0"
     template = "~> 2.1"
diff --git a/aws/flatcar-linux/kubernetes/versions.tf b/aws/flatcar-linux/kubernetes/versions.tf
index 38af1942..0ec41c2f 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"
   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 7f883f63..73e42fa7 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"
   required_providers {
     aws      = ">= 2.23, <= 4.0"
     template = "~> 2.1"
diff --git a/azure/fedora-coreos/kubernetes/versions.tf b/azure/fedora-coreos/kubernetes/versions.tf
index 9a947828..5773a4ff 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"
   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 2a6559c0..0640af4e 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"
   required_providers {
     azurerm  = "~> 2.8"
     template = "~> 2.1"
diff --git a/azure/flatcar-linux/kubernetes/versions.tf b/azure/flatcar-linux/kubernetes/versions.tf
index 9a947828..5773a4ff 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"
   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 2a6559c0..0640af4e 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"
   required_providers {
     azurerm  = "~> 2.8"
     template = "~> 2.1"
diff --git a/bare-metal/fedora-coreos/kubernetes/versions.tf b/bare-metal/fedora-coreos/kubernetes/versions.tf
index 1932ac1d..67de974c 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"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/bare-metal/flatcar-linux/kubernetes/versions.tf b/bare-metal/flatcar-linux/kubernetes/versions.tf
index 9e5c136b..47f2c08a 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"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/digital-ocean/fedora-coreos/kubernetes/versions.tf b/digital-ocean/fedora-coreos/kubernetes/versions.tf
index c9deb492..13326fc4 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"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/digital-ocean/flatcar-linux/kubernetes/versions.tf b/digital-ocean/flatcar-linux/kubernetes/versions.tf
index c9deb492..13326fc4 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"
   required_providers {
     template = "~> 2.1"
     null     = "~> 2.1"
diff --git a/docs/topics/maintenance.md b/docs/topics/maintenance.md
index 5fc874c6..8ac2c5b1 100644
--- a/docs/topics/maintenance.md
+++ b/docs/topics/maintenance.md
@@ -197,8 +197,7 @@ Typhoon modules have been updated for v0.13.x, but retain compatibility with v0.
 
 | Typhoon Release   | Terraform version   |
 |-------------------|---------------------|
-| v1.20.0 - ?       | v0.13.x, v0.14.x    |
-| v1.18.8 - v1.19.4 | v0.12.26+, v0.13.x  |
+| v1.18.8 - ?       | v0.12.26+, v0.13.x  |
 | v1.15.0 - v1.18.8 | v0.12.x             |
 | v1.10.3 - v1.15.0 | v0.11.x             |
 | v1.9.2 - v1.10.2  | v0.10.4+ or v0.11.x |
diff --git a/google-cloud/fedora-coreos/kubernetes/versions.tf b/google-cloud/fedora-coreos/kubernetes/versions.tf
index 99bd431f..b8176d9d 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"
   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 9404132f..33166ff6 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"
   required_providers {
     google   = ">= 2.19, < 4.0"
     template = "~> 2.1"
diff --git a/google-cloud/flatcar-linux/kubernetes/versions.tf b/google-cloud/flatcar-linux/kubernetes/versions.tf
index 99bd431f..b8176d9d 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"
   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 9404132f..33166ff6 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"
   required_providers {
     google   = ">= 2.19, < 4.0"
     template = "~> 2.1"