diff --git a/hanlp/common/document.py b/hanlp/common/document.py
index 6a43073fd..f433d8c5d 100644
--- a/hanlp/common/document.py
+++ b/hanlp/common/document.py
@@ -30,12 +30,12 @@ def words(self, words: List[str]):
 class Document(SerializableDict):
     def __init__(self) -> None:
         super().__init__()
-        self.sentences = []
-        self.tokens = []
-        self.part_of_speech_tags = []
-        self.named_entities = []
-        self.syntactic_dependencies = []
-        self.semantic_dependencies = []
+        # self.sentences = []
+        # self.tokens = []
+        # self.part_of_speech_tags = []
+        # self.named_entities = []
+        # self.syntactic_dependencies = []
+        # self.semantic_dependencies = []
 
     def __missing__(self, key):
         value = []
diff --git a/hanlp/version.py b/hanlp/version.py
index 7a205b2c1..9ce21cd00 100644
--- a/hanlp/version.py
+++ b/hanlp/version.py
@@ -2,4 +2,4 @@
 # Author: hankcs
 # Date: 2019-12-28 19:26
 
-__version__ = '2.0.0-alpha.33'
+__version__ = '2.0.0-alpha.34'