If you try Add-BindingRedirect
and it gets you nowhere (it didn't add the right redirect for me) you need to add the following into your Web.Config
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<!-- Other bindings here! -->
<dependentAssembly>
<assemblyIdentity name="Microsoft.WindowsAzure.Storage" publicKeyToken="31bf3856ad364e35" culture="neutral"/>
<bindingRedirect oldVersion="0.0.0.0-2.1.0.3" newVersion="2.1.0.3"/>
</dependentAssembly>
</assemblyBinding>