diff --git a/README.md b/README.md
index 53ba863..0a2a18c 100644
--- a/README.md
+++ b/README.md
@@ -189,7 +189,7 @@ No modules.
 | <a name="input_database"></a> [database](#input\_database) | The name of the database. | `string` | n/a | yes |
 | <a name="input_enable_multiple_grants"></a> [enable\_multiple\_grants](#input\_enable\_multiple\_grants) | A boolean that determines if multiple grants are enabled. | `bool` | `true` | no |
 | <a name="input_name"></a> [name](#input\_name) | The name of the pipe. | `string` | n/a | yes |
-| <a name="input_notification_channel"></a> [notification\_channel](#input\_notification\_channel) | The notification channel for the pipe. | `string` | `null` | no |
+| <a name="input_notification_channel"></a> [notification\_channel](#input\_notification\_channel) | The notification channel for the pipe. | `string` | `""` | no |
 | <a name="input_on_future"></a> [on\_future](#input\_on\_future) | ... | `bool` | `null` | no |
 | <a name="input_privilege"></a> [privilege](#input\_privilege) | The privilege for the grant. | `string` | `"USAGE"` | no |
 | <a name="input_roles"></a> [roles](#input\_roles) | The roles for the grant. | `list(string)` | `[]` | no |
diff --git a/variables.tf b/variables.tf
index fc4ff0f..bc51827 100644
--- a/variables.tf
+++ b/variables.tf
@@ -41,7 +41,7 @@ variable "name" {
 variable "notification_channel" {
   description = "The notification channel for the pipe."
   type        = string
-  default     = null
+  default     = ""
 }
 
 variable "on_future" {