Update README.md

tbarbugli · web-flow · commit 7ae1fd3d61bb · 2019-04-30T15:30:36.000+02:00
diff --git a/README.md b/README.md
@@ -31,7 +31,7 @@ STREAM_KEY=my_api_key STREAM_SECRET=my_api_secret py.test stream_chat/ -v
 Install black and pycodestyle
 
 ```
-pip install pycodestyle
+pip install black
 pip install pycodestyle
 ```
 
