diff --git a/variables.tf b/variables.tf
index 1adda9a..1a66fd3 100644
--- a/variables.tf
+++ b/variables.tf
@@ -137,9 +137,10 @@ variable "sku_name" {
 
 # tflint-ignore: terraform_unused_declarations
 variable "tracing_tags_enabled" {
-  type        = string
+  type        = bool
   description = "Whether enable tracing tags that generated by BridgeCrew Yor."
   default     = false
+  nullable    = false
 }
 
 # tflint-ignore: terraform_unused_declarations
@@ -147,4 +148,5 @@ variable "tracing_tags_prefix" {
   type        = string
   description = "Default prefix for generated tracing tags"
   default     = "avm_"
+  nullable    = false
 }
\ No newline at end of file