# Where does Pkg(3) find version numbers?

**URL:** <https://discourse.julialang.org/t/where-does-pkg-3-find-version-numbers/12330>\
**Category:** Internals & Design\
**Created:** [July 12, 2018, 12:49pm UTC](https://discourse.julialang.org/t/where-does-pkg-3-find-version-numbers/12330 "2018-07-12T12:49:00Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![kristoffer.carlsson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kristoffer.carlsson/32/22_2.png) [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)\
**Post date:** [July 12, 2018, 2:27pm UTC](https://discourse.julialang.org/t/where-does-pkg-3-find-version-numbers/12330/7 "2018-07-12T14:27:53Z")

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> [@jlapeyre](#):
>
> Add this to `.julia/environments/v0.7/Manifest.toml` :

Modifying the manifest by hand is usually not a good idea. It will likely be overwritten quickly.

> [@ExpandingMan](#):
>
> If there is no `version` explicitly in the file, it’s using the UUID? The UUID’s are for specific versions right?

No, it is for specific packages.

> [@ExpandingMan](#):
>
> Could you guys also clarify whether `Manifest.toml` should be included in repos?

See [Does Manifest.toml belong in the repository?](https://discourse.julialang.org/t/does-manifest-toml-belong-in-the-repository/12029)

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