diff --git a/.gitignore b/.gitignore
index 362bc61..e431846 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,3 +59,4 @@ flux-git-auth.yaml
 
 # custom
 _*
+output-files-for-flux
diff --git a/private-cluster-module/README.md b/private-cluster-module/README.md
index 6b50c29..09d8f61 100644
--- a/private-cluster-module/README.md
+++ b/private-cluster-module/README.md
@@ -101,7 +101,7 @@ Some manual tests.
 
 | Name | Version |
 |------|---------|
-| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | ~>1.8.0 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | ~>1.9 |
 | <a name="requirement_google"></a> [google](#requirement\_google) | ~>5.41.0 |
 | <a name="requirement_google-beta"></a> [google-beta](#requirement\_google-beta) | ~> 5.41 |
 | <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) | ~>2.32.0 |
diff --git a/private-cluster-module/versions.tf b/private-cluster-module/versions.tf
index 3bde509..f6d674e 100644
--- a/private-cluster-module/versions.tf
+++ b/private-cluster-module/versions.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = "~>1.8.0"
+  required_version = "~>1.9"
 
   required_providers {
     # https://github.com/hashicorp/terraform-provider-google
diff --git a/simple-template/README.md b/simple-template/README.md
index 082b7e2..d168e2e 100644
--- a/simple-template/README.md
+++ b/simple-template/README.md
@@ -78,7 +78,7 @@ Some manual tests.
 
 | Name | Version |
 |------|---------|
-| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | ~>1.8.0 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | ~>1.9 |
 | <a name="requirement_google"></a> [google](#requirement\_google) | ~>5.42.0 |
 | <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) | ~>2.32.0 |
 
diff --git a/simple-template/versions.tf b/simple-template/versions.tf
index 549f18e..98f8af1 100644
--- a/simple-template/versions.tf
+++ b/simple-template/versions.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = "~>1.8.0"
+  required_version = "~>1.9"
 
   required_providers {
     # https://github.com/hashicorp/terraform-provider-google