Update binder

README.md

@@ -3,7 +3,7 @@
 [![Travis](https://travis-ci.org/QuantStack/xeus-cling.svg?branch=master)](https://travis-ci.org/QuantStack/xeus-cling)
 [![Appveyor](https://ci.appveyor.com/api/projects/status/jh45g5pj44jqj8vw?svg=true)](https://ci.appveyor.com/project/QuantStack/xeus-cling)
 [![Documentation Status](http://readthedocs.org/projects/xeus-cling/badge/?version=latest)](https://xeus-cling.readthedocs.io/en/latest/?badge=latest)
-[![Binder](https://img.shields.io/badge/launch-binder-brightgreen.svg)](https://beta.mybinder.org/v2/gh/QuantStack/xeus-cling/0.4.4?filepath=notebooks/xcpp.ipynb)
+[![Binder](https://img.shields.io/badge/launch-binder-brightgreen.svg)](https://mybinder.org/v2/gh/QuantStack/xeus-cling/0.4.5?filepath=notebooks/xcpp.ipynb)
 [![Join the Gitter Chat](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/QuantStack/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 `xeus-cling` is a Jupyter kernel for C++ based on the C++ interpreter [cling](https://github.com/root-project/cling) and
@@ -41,7 +41,7 @@ make && make install
 To try out xeus-cling interactively in your web browser, just click on the binder
 link:
 
-[![Binder](binder-logo.svg)](https://mybinder.org/v2/gh/QuantStack/xeus-cling/0.4.4?filepath=notebooks/xcpp.ipynb)
+[![Binder](binder-logo.svg)](https://mybinder.org/v2/gh/QuantStack/xeus-cling/0.4.5?filepath=notebooks/xcpp.ipynb)
 
 ## Documentation