diff --git a/.tool-versions b/.tool-versions
index e72d8ca..1371b67 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,5 +1,5 @@
 pre-commit      4.0.1
-opentofu        1.8.8
+opentofu        1.9.0
 terraform-docs  0.19.0
 tflint          0.54.0
 trivy           0.58.1