diff --git a/backend/database/src/schema.ts b/backend/database/src/schema.ts
index 4403b96..e350d79 100644
--- a/backend/database/src/schema.ts
+++ b/backend/database/src/schema.ts
@@ -31,7 +31,7 @@ export const sandbox = sqliteTable("sandbox", {
 	createdAt: integer("createdAt", { mode: "timestamp_ms" }),
 	userId: text("user_id")
 		.notNull()
-		.references(() => user.id),
+		.references(() => user.id, { onDelete: "cascade" }),
 });
 
 export type Sandbox = typeof sandbox.$inferSelect;