diff --git a/README.md b/README.md
index 835036e..073a914 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ Acoused.
 You can use Pypi to get correct software environment and run the
 program.
 
-```shell
+```bat
 python -m venv env
 env\Scripts\activate.bat
 python -m pip install -U -r ..\virtualenv\requirements.txt