diff --git a/server/routes/api/documents/schema.ts b/server/routes/api/documents/schema.ts
index 78fb92339..286ed977c 100644
--- a/server/routes/api/documents/schema.ts
+++ b/server/routes/api/documents/schema.ts
@@ -8,7 +8,7 @@ const DocumentsSortParamsSchema = z.object({
   /** Specifies the attributes by which documents will be sorted in the list */
   sort: z
     .string()
-    .refine((val) => ["createdAt", "updatedAt", "index"].includes(val))
+    .refine((val) => ["createdAt", "updatedAt", "index", "title"].includes(val))
     .default("updatedAt"),
 
   /** Specifies the sort order with respect to sort field */