diff --git a/postgres/README.md b/postgres/README.md
index cc3e08d..d0c2a57 100644
--- a/postgres/README.md
+++ b/postgres/README.md
@@ -36,6 +36,7 @@ No modules.
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
+| <a name="input_availability"></a> [availability](#input\_availability) | Type of availability (normal=ZONAL, HA=REGIONAL) | `string` | `"ZONAL"` | no |
 | <a name="input_backup"></a> [backup](#input\_backup) | Switch to enable backups | `bool` | `true` | no |
 | <a name="input_db-size"></a> [db-size](#input\_db-size) | DB size/type | `string` | `"db-f1-micro"` | no |
 | <a name="input_db-version"></a> [db-version](#input\_db-version) | DB type and version (e.g. POSTGRES\_14) | `string` | `"POSTGRES_14"` | no |
diff --git a/postgres/main.tf b/postgres/main.tf
index 8095a08..9e1a718 100644
--- a/postgres/main.tf
+++ b/postgres/main.tf
@@ -27,6 +27,7 @@ resource "google_sql_database_instance" "this" {
         point_in_time_recovery_enabled = true
       }
     }
+    availability_type = var.availability
   }
   depends_on = [google_service_networking_connection.this]
 }
diff --git a/postgres/variables.tf b/postgres/variables.tf
index 94ba803..29415cb 100644
--- a/postgres/variables.tf
+++ b/postgres/variables.tf
@@ -1,3 +1,13 @@
+variable "availability" {
+  default     = "ZONAL"
+  description = "Type of availability (normal=ZONAL, HA=REGIONAL)"
+  type        = string
+  validation {
+    condition     = contains(["ZONAL", "REGIONAL"], var.availability)
+    error_message = "It has to be 'ZONAL' or 'REGIONAL'"
+  }
+}
+
 variable "backup" {
   default     = true
   description = "Switch to enable backups"