diff --git a/cloud/gcp/lb/README.md b/cloud/gcp/lb/README.md
index cc707e7..95b0a91 100644
--- a/cloud/gcp/lb/README.md
+++ b/cloud/gcp/lb/README.md
@@ -45,14 +45,16 @@ Creates DataDog monitors with the following checks:
 | error_rate_4xx_extra_tags | Extra tags for GCP LB 4XX Errors monitor | list | `<list>` | no |
 | error_rate_4xx_message | Custom message for the GCP LB 4XX Errors monitor | string | `` | no |
 | error_rate_4xx_silenced | Groups to mute for GCP LB 4XX Errors monitor | map | `<map>` | no |
-| error_rate_4xx_threshold_critical | Rate error in percentage (critical threshold) | string | `50` | no |
+| error_rate_4xx_threshold_critical | Rate error in percentage (critical threshold) | string | `60` | no |
+| error_rate_4xx_threshold_warning | Rate error in percentage (warning threshold) | string | `50` | no |
 | error_rate_4xx_time_aggregator | Timeframe for the GCP LB 4XX Errors monitor | string | `sum` | no |
 | error_rate_4xx_timeframe | Timeframe for the GCP LB 4XX Errors monitor | string | `last_5m` | no |
 | error_rate_5xx_artificial_request | Divisor Delta for the GCP LB 5XX Errors monitor | string | `5` | no |
 | error_rate_5xx_extra_tags | Extra tags for GCP LB 5XX Errors monitor | list | `<list>` | no |
 | error_rate_5xx_message | Custom message for the GCP LB 5XX Errors monitor | string | `` | no |
 | error_rate_5xx_silenced | Groups to mute for GCP LB 5XX Errors monitor | map | `<map>` | no |
-| error_rate_5xx_threshold_critical | Rate error in percentage (critical threshold) | string | `50` | no |
+| error_rate_5xx_threshold_critical | Rate error in percentage (critical threshold) | string | `40` | no |
+| error_rate_5xx_threshold_warning | Rate error in percentage (warning threshold) | string | `30` | no |
 | error_rate_5xx_time_aggregator | Timeframe for the GCP LB 5XX Errors monitor | string | `sum` | no |
 | error_rate_5xx_timeframe | Timeframe for the GCP LB 5XX Errors monitor | string | `last_5m` | no |
 | evaluation_delay | Delay in seconds for the metric evaluation | string | `900` | no |
diff --git a/cloud/gcp/lb/inputs.tf b/cloud/gcp/lb/inputs.tf
index 69f3375..9d02c17 100644
--- a/cloud/gcp/lb/inputs.tf
+++ b/cloud/gcp/lb/inputs.tf
@@ -52,10 +52,16 @@ variable "error_rate_4xx_artificial_request" {
   default     = 5
 }
 
+variable "error_rate_4xx_threshold_warning" {
+  description = "Rate error in percentage (warning threshold)"
+  type        = "string"
+  default     = 50
+}
+
 variable "error_rate_4xx_threshold_critical" {
   description = "Rate error in percentage (critical threshold)"
   type        = "string"
-  default     = 50
+  default     = 60
 }
 
 variable "error_rate_4xx_silenced" {
@@ -97,10 +103,16 @@ variable "error_rate_5xx_artificial_request" {
   default     = 5
 }
 
+variable "error_rate_5xx_threshold_warning" {
+  description = "Rate error in percentage (warning threshold)"
+  type        = "string"
+  default     = 30
+}
+
 variable "error_rate_5xx_threshold_critical" {
   description = "Rate error in percentage (critical threshold)"
   type        = "string"
-  default     = 50
+  default     = 40
 }
 
 variable "error_rate_5xx_silenced" {
diff --git a/cloud/gcp/lb/monitors-lb.tf b/cloud/gcp/lb/monitors-lb.tf
index 8982222..674091d 100644
--- a/cloud/gcp/lb/monitors-lb.tf
+++ b/cloud/gcp/lb/monitors-lb.tf
@@ -16,6 +16,7 @@ resource "datadog_monitor" "error_rate_4xx" {
 EOF
 
   thresholds {
+    warning  = "${var.error_rate_4xx_threshold_warning}"
     critical = "${var.error_rate_4xx_threshold_critical}"
   }
 
@@ -53,6 +54,7 @@ resource "datadog_monitor" "error_rate_5xx" {
 EOF
 
   thresholds {
+    warning  = "${var.error_rate_5xx_threshold_warning}"
     critical = "${var.error_rate_5xx_threshold_critical}"
   }