diff --git a/variables.tf b/variables.tf
index ddf1c68..5b4c617 100644
--- a/variables.tf
+++ b/variables.tf
@@ -1,5 +1,6 @@
 variable "create_resource_group" {
   description = "Whether to create resource group and use it for all networking resources"
+  type        = bool
   default     = true
 }