diff --git a/vn.strategy/strategydemo/produceBarData.py b/vn.strategy/strategydemo/produceBarData.py
index 1db6eb69..3452e2d3 100644
--- a/vn.strategy/strategydemo/produceBarData.py
+++ b/vn.strategy/strategydemo/produceBarData.py
@@ -2,7 +2,7 @@
 
 from strategyEngine import *
 from backtestingEngine import *
-from stratetyProduceBar import StrategyProduceBar
+from strategyProduceBar import StrategyProduceBar
 import decimal
 
 def main():
diff --git a/vn.strategy/strategydemo/strategyEngine.py b/vn.strategy/strategydemo/strategyEngine.py
index 35a50f5c..66333f60 100644
--- a/vn.strategy/strategydemo/strategyEngine.py
+++ b/vn.strategy/strategydemo/strategyEngine.py
@@ -1081,7 +1081,7 @@ class StrategyTemplate(object):
                 return ref
         else:
             return None
-        
+
         print (u'strategyEngine.py cover() end.')
 
     #----------------------------------------------------------------------
diff --git a/vn.strategy/strategydemo/stratetyProduceBar.py b/vn.strategy/strategydemo/strategyProduceBar.py
similarity index 100%
rename from vn.strategy/strategydemo/stratetyProduceBar.py
rename to vn.strategy/strategydemo/strategyProduceBar.py