cant install

I fallow instruction bug get this error 
```
  Problem 1
    - Installation request for friendsofsymfony/comment-bundle ^3.0 -> satisfiable by friendsofsymfony/comment-bundle[v3.0.0].
    - friendsofsymfony/comment-bundle v3.0.0 requires symfony/framework-bundle ~3.4|^4.3 -> no matching package found.

```