# Changing package dependency revisions (AWSCore/HTTP)
**URL:** https://discourse.julialang.org/t/changing-package-dependency-revisions-awscore-http/33428
**Category:** General Usage
**Tags:** question
**Created:** [January 16, 2020, 2:18am UTC](https://discourse.julialang.org/t/changing-package-dependency-revisions-awscore-http/33428 "2020-01-16T02:18:37Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@jade\_mackay](https://discourse.julialang.org/u/jade_mackay)
#### Post date: [January 16, 2020, 2:18am UTC](https://discourse.julialang.org/t/changing-package-dependency-revisions-awscore-http/33428/1 "2020-01-16T02:18:37Z")
I need to use `AWSCore` though a proxy. The current release of `AWSCore` (`0.6.7`) specifies compatibility with dependency `HTTP` version `0.8`. The `HTTP` proxy functionality I need has been merged to master but has yet to be released.
Is there a sensible way that I can make AWSCore use the unreleased HTTP code on master?
Many thanks, Jade
---
### Author:  [@00vareladavid](https://discourse.julialang.org/u/00vareladavid)
#### Post date: [January 16, 2020, 3:50am UTC](https://discourse.julialang.org/t/changing-package-dependency-revisions-awscore-http/33428/2 "2020-01-16T03:50:31Z")
Sure, you always have the option of using unregistered code.
The `#branch` syntax will track a dependency at some branch. In your case:
```julia
(someproject) pkg> add AWSCore HTTP#master
```
Once the new feature is realeased you can go back to tracking registered versions with `free`:
```julia
(someproject) pkg> free HTTP
```
---
### Author:  [@jade\_mackay](https://discourse.julialang.org/u/jade_mackay)
#### Post date: [January 17, 2020, 12:14am UTC](https://discourse.julialang.org/t/changing-package-dependency-revisions-awscore-http/33428/3 "2020-01-17T00:14:21Z")
That’s great thanks!