diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 1fe0792..e214101 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -32,10 +32,8 @@ jobs:
     strategy:
       matrix:
         terraform:
-        - 1.6.6
-        - 0.15.5
-        - 0.14.11
-        - 0.13.7
+        - 1.9.0
+        - 1.8.5
         - 0.12.31
     env:
       TERRAFORM_VERSION: ${{ matrix.terraform }}
diff --git a/README.md b/README.md
index 28cb2d8..558c848 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ A schema inspector for Terraform / OpenTofu providers.
 - List available resource types.
 - Autocomplete resource types in bash/zsh.
 - Open official provider documents quickly by your system web browser.
-- Terraform v0.15+ support (minimum requirements: Terraform >= v0.12)
+- Terraform v1.x support (minimum requirements: Terraform >= v0.12)
 - OpenTofu v1.6+ support
 
 ![demo](/images/tfschema-demo.gif)