diff --git a/README.md b/README.md
index 0582fe8..dcf23e4 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,13 @@
 
 ```sh
 $ yarn
+# When you need to run for testing.
 $ yarn start
+
+# When you need to make an executable file (*.exe). After that, it will go "out" directory.
 $ yarn package:win
+
+# When repository is updated, please run the following command.
+$ git pull
+
 ```
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