diff --git a/README.md b/README.md
index 9114aa5..c98ca98 100644
--- a/README.md
+++ b/README.md
@@ -74,13 +74,13 @@
 ```
 $ plot
 ```
-![sample_plot.png](https://github.com/parsecmonkey/RepoMainForPy/blob/main/pic/sample_plot.png "sample_plot.png")
+![sample_plot.png](http://nitta-lab-www.is.konan-u.ac.jp/gitbucket/d-matsuura/RepoMainForPy/blob/master/pic/sample_plot.png "sample_plot.png")
 
 ### message
 ```
 $ message
 ```
-<img alt="sample_message.png" src="https://github.com/parsecmonkey/RepoMainForPy/blob/main/pic/sample_message.png" width="30%">
+<img alt="sample_message.png" src="http://nitta-lab-www.is.konan-u.ac.jp/gitbucket/d-matsuura/RepoMainForPy/blob/master/pic/sample_message.png" width="30%">
 
 ### exit
 ```