How to get Microsoft.Azure.Mobile.Client to update to v4.0 in xamarin forms

I cannot get the Azure mobile client package to update to v4.0 any suggestions? Getting the following error:
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Install failed. Rolling back...
Package 'Microsoft.Azure.Mobile.Client 4.0.0' does not exist in project 'Wager'
For adding package 'Microsoft.Azure.Mobile.Client 3.1.0' to project 'Wager' that targets 'portable45-net45+win8+wpa81'.
For adding package 'Microsoft.Azure.Mobile.Client 3.1.0' to project 'Wager' that targets 'portable45-net45+win8+wpa81'.
Package 'Microsoft.Azure.Mobile.Client 3.1.0' already exists in folder '/Users/tylerdicks/WagerApp/Wager/packages'
Added reference 'Microsoft.WindowsAzure.Mobile' to project 'Wager'.
Added package 'Microsoft.Azure.Mobile.Client 3.1.0' to 'packages.config'
Added file 'packages.config' to project 'Wager'.
Executing nuget actions took 604.37 ms
Could not install package 'Microsoft.Azure.Mobile.Client 4.0.0'. You are trying to install this package into a project that targets '.NETPortable,Version=v4.5,Profile=Profile111', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.