diff --git a/terraform/azure/application-gateway/dev/.terraform-version b/terraform/azure/application-gateway/dev/.terraform-version
index 9f05f9f2c..ec70f7556 100644
--- a/terraform/azure/application-gateway/dev/.terraform-version
+++ b/terraform/azure/application-gateway/dev/.terraform-version
@@ -1 +1 @@
-1.6.5
+1.6.6
diff --git a/terraform/azure/bastion/network/.terraform-version b/terraform/azure/bastion/network/.terraform-version
index 9f05f9f2c..ec70f7556 100644
--- a/terraform/azure/bastion/network/.terraform-version
+++ b/terraform/azure/bastion/network/.terraform-version
@@ -1 +1 @@
-1.6.5
+1.6.6
diff --git a/terraform/azure/hub/network/.terraform-version b/terraform/azure/hub/network/.terraform-version
index 9f05f9f2c..ec70f7556 100644
--- a/terraform/azure/hub/network/.terraform-version
+++ b/terraform/azure/hub/network/.terraform-version
@@ -1 +1 @@
-1.6.5
+1.6.6
diff --git a/terraform/k3s/observability/.terraform-version b/terraform/k3s/observability/.terraform-version
index 9f05f9f2c..ec70f7556 100644
--- a/terraform/k3s/observability/.terraform-version
+++ b/terraform/k3s/observability/.terraform-version
@@ -1 +1 @@
-1.6.5
+1.6.6