# Unable to resolve dependency 'Hangfire.Core (= 1.5.6)'

**URL:** <https://discuss.hangfire.io/t/unable-to-resolve-dependency-hangfire-core-1-5-6/2064>\
**Category:** bug?\
**Created:** [May 30, 2016, 11:54am UTC](https://discuss.hangfire.io/t/unable-to-resolve-dependency-hangfire-core-1-5-6/2064 "2016-05-30T11:54:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Corstiaan](https://avatars.discourse-cdn.com/v4/letter/c/da6949/32.png) [@Corstiaan](https://discuss.hangfire.io/u/Corstiaan)\
**Post date:** [May 30, 2016, 11:54am UTC](https://discuss.hangfire.io/t/unable-to-resolve-dependency-hangfire-core-1-5-6/2064/1 "2016-05-30T11:54:50Z")

</div>

When trying to install HangFire.Postgresql from NuGet from within Xamarin Studio / MonoDevelop, I get the following error:

Unable to resolve dependency ‘Hangfire.Core (= 1.5.6)’.

I cant install the Hangfire.Core (1.5.6) package by itself as well. Any ideas? 🙂