diff --git a/IF.Lastfm.Core/IF.Lastfm.Core.csproj b/IF.Lastfm.Core/IF.Lastfm.Core.csproj
index 2ad5e39..3c75535 100644
--- a/IF.Lastfm.Core/IF.Lastfm.Core.csproj
+++ b/IF.Lastfm.Core/IF.Lastfm.Core.csproj
@@ -11,11 +11,31 @@
     <RootNamespace>IF.Lastfm.Core</RootNamespace>
     <AssemblyName>IF.Lastfm.Core</AssemblyName>
     <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
-    <TargetFrameworkProfile>Profile104</TargetFrameworkProfile>
+    <TargetFrameworkProfile>Profile158</TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
+    <FileUpgradeFlags>
+    </FileUpgradeFlags>
+    <UpgradeBackupLocation>
+    </UpgradeBackupLocation>
+    <OldToolsVersion>4.0</OldToolsVersion>
+    <PublishUrl>publish\</PublishUrl>
+    <Install>true</Install>
+    <InstallFrom>Disk</InstallFrom>
+    <UpdateEnabled>false</UpdateEnabled>
+    <UpdateMode>Foreground</UpdateMode>
+    <UpdateInterval>7</UpdateInterval>
+    <UpdateIntervalUnits>Days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
+    <UpdateRequired>false</UpdateRequired>
+    <MapFileExtensions>true</MapFileExtensions>
+    <ApplicationRevision>0</ApplicationRevision>
+    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <IsWebBootstrapper>false</IsWebBootstrapper>
+    <UseApplicationTrust>false</UseApplicationTrust>
+    <BootstrapperEnabled>true</BootstrapperEnabled>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -36,6 +56,7 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- A reference to the entire .NET Framework is automatically included -->
+    <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
@@ -103,32 +124,49 @@
       <HintPath>..\packages\Microsoft.Bcl.Async.1.0.16\lib\portable-net40+sl4+win8+wp71\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json">
-      <HintPath>..\packages\Newtonsoft.Json.5.0.6\lib\portable-net40+sl4+wp7+win8\Newtonsoft.Json.dll</HintPath>
+      <HintPath>..\..\packages\Newtonsoft.Json.5.0.8\lib\portable-net40+sl4+wp7+win8\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="System.IO">
+      <HintPath>..\..\packages\Microsoft.Bcl.1.1.3\lib\portable-net40+sl5+win8+wp8\System.IO.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http">
-      <HintPath>..\packages\Microsoft.Net.Http.2.1.10\lib\portable-net40+sl4+win8+wp71\System.Net.Http.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.15\lib\portable-net40+sl4+win8+wp71\System.Net.Http.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http.Extensions">
-      <HintPath>..\packages\Microsoft.Net.Http.2.1.10\lib\portable-net40+sl4+win8+wp71\System.Net.Http.Extensions.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.15\lib\portable-net40+sl4+win8+wp71\System.Net.Http.Extensions.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http.Primitives">
-      <HintPath>..\packages\Microsoft.Net.Http.2.1.10\lib\portable-net40+sl4+win8+wp71\System.Net.Http.Primitives.dll</HintPath>
-      <Private>True</Private>
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.15\lib\portable-net40+sl4+win8+wp71\System.Net.Http.Primitives.dll</HintPath>
     </Reference>
     <Reference Include="System.Runtime">
-      <HintPath>..\packages\Microsoft.Bcl.1.0.19\lib\portable-net40+sl4+win8+wp71\System.Runtime.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Bcl.1.1.3\lib\portable-net40+sl5+win8+wp8\System.Runtime.dll</HintPath>
     </Reference>
     <Reference Include="System.Threading.Tasks">
-      <HintPath>..\packages\Microsoft.Bcl.1.0.19\lib\portable-net40+sl4+win8+wp71\System.Threading.Tasks.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Bcl.1.1.3\lib\portable-net40+sl5+win8+wp8\System.Threading.Tasks.dll</HintPath>
     </Reference>
     <Reference Include="xBrainLab.Security.Cryptography">
       <HintPath>..\lib\xBrainLab.Security.Cryptography.dll</HintPath>
     </Reference>
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <BootstrapperPackage Include="Microsoft.Net.Client.3.5">
+      <Visible>False</Visible>
+      <ProductName>.NET Framework 3.5 SP1 Client Profile</ProductName>
+      <Install>false</Install>
+    </BootstrapperPackage>
+    <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1">
+      <Visible>False</Visible>
+      <ProductName>.NET Framework 3.5 SP1</ProductName>
+      <Install>false</Install>
+    </BootstrapperPackage>
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
-  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.7\tools\Microsoft.Bcl.Build.targets" />
+  <Import Project="..\..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets" Condition="Exists('..\..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureBclBuildImported" BeforeTargets="BeforeBuild" Condition="'$(BclBuildImported)' == ''">
+    <Error Condition="!Exists('..\..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets')" Text="This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=317567." HelpKeyword="BCLBUILD2001" />
+    <Error Condition="Exists('..\..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets')" Text="The build restored NuGet packages. Build the project again to include these packages in the build. For more information, see http://go.microsoft.com/fwlink/?LinkID=317568." HelpKeyword="BCLBUILD2002" />
+  </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/IF.Lastfm.Core/packages.config b/IF.Lastfm.Core/packages.config
index 2deb44e..0e48257 100644
--- a/IF.Lastfm.Core/packages.config
+++ b/IF.Lastfm.Core/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.Bcl" version="1.0.19" targetFramework="portable-win+net45+sl40+wp71" />
+  <package id="Microsoft.Bcl" version="1.1.3" targetFramework="portable-net45+sl50+wp80+win" />
   <package id="Microsoft.Bcl.Async" version="1.0.16" targetFramework="portable-win+net45+sl40+wp71" />
-  <package id="Microsoft.Bcl.Build" version="1.0.7" targetFramework="portable-win+net45+sl40+wp71" />
-  <package id="Microsoft.Net.Http" version="2.1.10" targetFramework="portable-win+net45+sl40+wp71" />
-  <package id="Newtonsoft.Json" version="5.0.6" targetFramework="portable-win+net45+sl40+wp71" />
+  <package id="Microsoft.Bcl.Build" version="1.0.10" targetFramework="portable-net45+sl50+wp80+win" />
+  <package id="Microsoft.Net.Http" version="2.2.15" targetFramework="portable-net45+sl50+wp80+win" />
+  <package id="Newtonsoft.Json" version="5.0.8" targetFramework="portable-net45+sl50+wp80+win" />
 </packages>
\ No newline at end of file