diff --git a/dataproperty/_property_extractor.py b/dataproperty/_property_extractor.py
index acfa812..ffa38df 100644
--- a/dataproperty/_property_extractor.py
+++ b/dataproperty/_property_extractor.py
@@ -4,6 +4,8 @@
 .. codeauthor:: Tsuyoshi Hombashi <gogogo.vm@gmail.com>
 """
 
+from six.moves import zip
+
 from ._data_property import DataProperty
 from ._data_property import ColumnDataProperty
 from ._function import is_empty_sequence
diff --git a/setup.py b/setup.py
index dedb925..251fa5d 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
 
 setuptools.setup(
     name=project_name,
-    version="0.8.0",
+    version="0.8.1",
     url="https://github.com/thombashi/" + project_name,
     bugtrack_url="https://github.com/thombashi/{:s}/issues".format(
         project_name),