diff --git a/fastNLP/io/loader/__init__.py b/fastNLP/io/loader/__init__.py
index bcb3b730..1da3e125 100644
--- a/fastNLP/io/loader/__init__.py
+++ b/fastNLP/io/loader/__init__.py
@@ -59,8 +59,8 @@ __all__ = [
     'OntoNotesNERLoader',
     'CTBLoader',
 
-    'CSVLoader',
-    'JsonLoader',
+    # 'CSVLoader',
+    # 'JsonLoader',
 
     'CWSLoader',