As [explained](https://getcomposer.org/doc/articles/aliases.md#why-aliases-) in the composer documentation you should not require the ```dev-master``` branch. If you want to use the master branch you should require ```1.1.*``` as we created a [branch alias](https://github.com/theodo/TheodoEvolutionSessionBundle/blob/master/composer.json#L35) in the ```composer.json```.

Can you remove this change? Then I will merge this PR. 
Thank you :smile: