diff --git a/app/Controllers/InstallerController.php b/app/Controllers/InstallerController.php
index 05c2c2c..f954c18 100644
--- a/app/Controllers/InstallerController.php
+++ b/app/Controllers/InstallerController.php
@@ -49,6 +49,7 @@ class InstallerController extends Controller
             '016_add_tags_to_domains.sql',
             '017_add_two_factor_authentication.sql',
             '018_add_user_isolation.sql',
+            '019_add_webhook_channel_type.sql',
         ];
         
         try {
@@ -183,7 +184,8 @@ class InstallerController extends Controller
                     '015_create_error_logs_table.sql',
                     '016_add_tags_to_domains.sql',
                     '017_add_two_factor_authentication.sql',
-                    '018_add_user_isolation.sql'
+                    '018_add_user_isolation.sql',
+                    '019_add_webhook_channel_type.sql'
                 ];
             }
             
@@ -364,6 +366,7 @@ class InstallerController extends Controller
                     '016_add_tags_to_domains.sql',
                     '017_add_two_factor_authentication.sql',
                     '018_add_user_isolation.sql',
+                    '019_add_webhook_channel_type.sql',
                 ];
                 
                 $stmt = $pdo->prepare("INSERT INTO migrations (migration) VALUES (?) ON DUPLICATE KEY UPDATE migration=migration");
diff --git a/database/migrations/000_initial_schema_v1.1.0.sql b/database/migrations/000_initial_schema_v1.1.0.sql
index bdfe997..1fa5573 100644
--- a/database/migrations/000_initial_schema_v1.1.0.sql
+++ b/database/migrations/000_initial_schema_v1.1.0.sql
@@ -182,7 +182,7 @@ CREATE TABLE IF NOT EXISTS user_notifications (
 CREATE TABLE IF NOT EXISTS notification_channels (
     id INT AUTO_INCREMENT PRIMARY KEY,
     notification_group_id INT NOT NULL,
-    channel_type ENUM('email', 'telegram', 'discord', 'slack') NOT NULL,
+    channel_type ENUM('email', 'telegram', 'discord', 'slack', 'webhook') NOT NULL,
     channel_config JSON NOT NULL,
     is_active BOOLEAN DEFAULT TRUE,
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
diff --git a/database/migrations/019_add_webhook_channel_type.sql b/database/migrations/019_add_webhook_channel_type.sql
new file mode 100644
index 0000000..9482969
--- /dev/null
+++ b/database/migrations/019_add_webhook_channel_type.sql
@@ -0,0 +1,5 @@
+-- Add 'webhook' to the channel_type ENUM in notification_channels table
+-- This allows custom webhook integrations like Mattermost
+
+ALTER TABLE notification_channels 
+MODIFY COLUMN channel_type ENUM('email', 'telegram', 'discord', 'slack', 'webhook') NOT NULL;