diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce45cfa..bd0ab2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 IMPROVEMENTS:
 
+* Enabling CI testing for versions `1.9` of Terraform
+
 NOTES:
 
 * Moved build to [Golang `v1.23`](https://go.dev/blog/go1.23)
diff --git a/README.md b/README.md
index f3db5d1..a7c3af6 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,12 @@ version it implements, and Terraform:
 |:--------:|:-----------------:|:---------:|
 | `>= 1.x` |        `5`        | `>= 0.12` |
 
+### CI Testing
+
+This provider is tested against Terraform versions from `0.12` to `1.9`.
+See the [Build and Test](https://github.com/tfzk/terraform-provider-zookeeper/blob/main/.github/workflows/build-test.yml)
+workflow.
+
 ## Provider features
 
 * [x] support for ZK standard multi-server connection string
@@ -47,7 +53,7 @@ version it implements, and Terraform:
 
 ### Requirements
 
-* [Go](https://go.dev/dl/) >= `1.22`
+* [Go](https://go.dev/dl/) >= `1.23`
 * [Docker](https://docs.docker.com/get-docker/)
 * [Docker Compose](https://docs.docker.com/compose/install/)
 * [golangci-lint](https://golangci-lint.run/)