diff --git a/.tool-versions b/.tool-versions
index b3ee1b5..08cd21c 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,4 +1,4 @@
-terraform 1.5.7
+terraform 1.6.4
 terraform-docs 0.16.0
 tflint 0.48.0
 pre-commit 3.5.0