diff --git a/examples/data/rag_bm/dataset_info.json b/examples/data/rag_bm/dataset_info.json
index b1ddd7e4c..308dc8fc7 100644
--- a/examples/data/rag_bm/dataset_info.json
+++ b/examples/data/rag_bm/dataset_info.json
@@ -16,4 +16,5 @@
       "document_file":["documents.txt"],
       "gt_file":"answer.json"
     }
+  }
 ]