Update README.md

README.md

-
 # pvlink
 
 [![Build Status](https://travis-ci.org//pvlink.svg?branch=master)](https://travis-ci.org//pvlink)
@@ -9,17 +8,11 @@ ParaView-Web RemoteRenderer in Jupyter
 
 ## Installation
 
-You can install using `pip`:
-
-```bash
-pip install pvlink
-```
-
-Or if you use jupyterlab:
+You can install pvlink using `pip` and `jupyter labextension install`:
 
 ```bash
 pip install pvlink
-jupyter labextension install @jupyter-widgets/jupyterlab-manager
+jupyter labextension install pvlink
 ```
 
 If you are using Jupyter Notebook 5.2 or earlier, you may also need to enable