diff --git a/vnpy/__init__.py b/vnpy/__init__.py
index 6d5daf90..5477e7f3 100644
--- a/vnpy/__init__.py
+++ b/vnpy/__init__.py
@@ -1,4 +1,4 @@
 # encoding: UTF-8
 
-__version__ = '1.8.0'
+__version__ = '1.8.1'
 __author__ = 'Xiaoyou Chen'
\ No newline at end of file