diff --git a/README.md b/README.md
index 5b94818..7c47395 100644
--- a/README.md
+++ b/README.md
@@ -52,21 +52,21 @@ Then, samaritan is running at `http://localhost:19876`.
 
 ### Add an Exchange
 
-![](http://samaritan.stockdb.org/_media/add-exchange.png)
+![](https://raw.githubusercontent.com/miaolz123/samaritan/master/docs/_media/add-exchange.png)
 
 ### Add an Algorithm
 
-![](http://samaritan.stockdb.org/_media/add-algorithm.png)
+![](https://raw.githubusercontent.com/miaolz123/samaritan/master/docs/_media/add-algorithm.png)
 
-![](http://samaritan.stockdb.org/_media/edit-algorithm.png)
+![](https://raw.githubusercontent.com/miaolz123/samaritan/master/docs/_media/edit-algorithm.png)
 
 ### Deploy an Algorithm
 
-![](http://samaritan.stockdb.org/_media/add-trader.png)
+![](https://raw.githubusercontent.com/miaolz123/samaritan/master/docs/_media/add-trader.png)
 
 ### Run a Trader
 
-![](http://samaritan.stockdb.org/_media/run-trader.png)
+![](https://raw.githubusercontent.com/miaolz123/samaritan/master/docs/_media/run-trader.png)
 
 ## Algorithm Reference