diff --git a/src/routes/project.routes.js b/src/routes/project.routes.js
index f5ac657..db108a9 100644
--- a/src/routes/project.routes.js
+++ b/src/routes/project.routes.js
@@ -278,6 +278,25 @@ const router = express.Router();
  *               type: array
  *               items:
  *                 $ref: '#/components/schemas/ProjectTaskItem'
+ *             certificates:
+ *               type: array
+ *               items:
+ *                 type: object
+ *                 properties:
+ *                   id_user:
+ *                     type: integer
+ *                     example: 5
+ *                   certificate_no:
+ *                     type: string
+ *                     example: "CERT/20260609/PRJ2/USR5"
+ *                   uuid:
+ *                     type: string
+ *                     format: uuid
+ *                     example: "f81d4fae-7dec-11d0-a765-00a0c91e6bf6"
+ *                   issued_at:
+ *                     type: string
+ *                     format: date-time
+ *                     example: "2026-06-09T14:00:00.000Z"
  *     ProjectListResponse:
  *       type: object
  *       properties: