Update README.md

README.md

@@ -96,7 +96,7 @@ You can either run the Flask RESTful server app as a docker container or just as
 
 ### Client
 
-Once the app is running, you can send a text to the server. You can do so with a [client.py](client.py). The usage is elow:
+Once the app is running, you can send a text to the server. First install the necessary packages: `pip install -r requirements-client.txt`, and the run the [client.py](client.py). The usage is as below:
 
 ```console
 client.py [-h] [--url-emoberta URL_EMOBERTA] --text TEXT