# Can't find source of deprecation

**URL:** <https://discuss.emberjs.com/t/cant-find-source-of-deprecation/12333>\
**Category:** Uncategorized\
**Created:** [January 29, 2017, 8:50am UTC](https://discuss.emberjs.com/t/cant-find-source-of-deprecation/12333 "2017-01-29T08:50:42Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![davegoulash](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/davegoulash/32/14401_2.png) [@davegoulash](https://discuss.emberjs.com/u/davegoulash)\
**Post date:** [January 29, 2017, 8:50am UTC](https://discuss.emberjs.com/t/cant-find-source-of-deprecation/12333/1 "2017-01-29T08:50:42Z")

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Hi,

I’ve trying to find to source of this deprecation, but can’t. Can someone help me?

 ![](https://us1.discourse-cdn.com/flex019/uploads/emberjs_public/original/2X/7/718c2da5d88e05e5434ec9a07b35bf17296f7353.png)

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**Author:** ![broerse](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/broerse/32/9497_2.png) [@broerse](https://discuss.emberjs.com/u/broerse)\
**Post date:** [January 29, 2017, 9:16am UTC](https://discuss.emberjs.com/t/cant-find-source-of-deprecation/12333/2 "2017-01-29T09:16:29Z")

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It seems to be coming from an addon. See [Become a "real" polyfill. · Issue #5 · ember-polyfills/ember-getowner-polyfill · GitHub](https://github.com/rwjblue/ember-getowner-polyfill/issues/5)

Maybe run `npm ll` to find out who uses it.

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<div class="post-metadata">

**Author:** ![davegoulash](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/davegoulash/32/14401_2.png) [@davegoulash](https://discuss.emberjs.com/u/davegoulash)\
**Post date:** [January 29, 2017, 11:10am UTC](https://discuss.emberjs.com/t/cant-find-source-of-deprecation/12333/3 "2017-01-29T11:10:36Z")

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> [@broerse](#):
>
> run npm ll

Ah I have a whole bunch of them using it it seems… Thanks!

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**Author:** ![charlatan154](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/charlatan154/32/15681_2.png) [@charlatan154](https://discuss.emberjs.com/u/charlatan154)\
**Post date:** [February 2, 2017, 8:50pm UTC](https://discuss.emberjs.com/t/cant-find-source-of-deprecation/12333/4 "2017-02-02T20:50:50Z")

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For me was ember-simple-auth. Upgrading to latest one fix it.