diff --git a/comments/database.sql b/comments/database.sql
index 36d1f1f563162e24dd33a15fedb2fbcdac4521e5..966f3c43f7c8769c356c3894838df900888b3c39 100644
--- a/comments/database.sql
+++ b/comments/database.sql
@@ -21,7 +21,7 @@ CREATE TABLE users (
 CREATE TABLE targets (
     id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
     domain VARCHAR(255) NOT NULL, -- combines sdk & version
-    type ENUM('class', 'guide', 'video') NOT NULL DEFAULT 'class',
+    type ENUM('class', 'guide', 'video', 'unknown', 'challenge') NOT NULL DEFAULT 'class',
     cls VARCHAR(255) NOT NULL,    -- "Ext.draw.Sprite"
     member VARCHAR(255) NOT NULL  -- "method-setAttributes"
 );