diff --git a/System.Device.Spi.sln b/System.Device.Spi.sln
index 16e75c647..97b12f26b 100644
--- a/System.Device.Spi.sln
+++ b/System.Device.Spi.sln
@@ -1,4 +1,4 @@
-
+
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
 VisualStudioVersion = 16.0.31105.61
diff --git a/System.Device.Spi/System.Device.Spi.nfproj b/System.Device.Spi/System.Device.Spi.nfproj
index 9b05b054e..12ff6048c 100644
--- a/System.Device.Spi/System.Device.Spi.nfproj
+++ b/System.Device.Spi/System.Device.Spi.nfproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="Current" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup Label="Globals">
     <NanoFrameworkProjectSystemPath>$(MSBuildToolsPath)..\..\..\nanoFramework\v1.0\</NanoFrameworkProjectSystemPath>
@@ -41,7 +41,7 @@
     </NFMDP_PE_ExcludeClassByName>
   </ItemGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.5-alpha.145.6\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.5-preview.4\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -61,11 +61,11 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.5-alpha.145.6\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.5-preview.4\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.9.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.9.0-preview.27\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.9.0-preview.28\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Device.Gpio, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
diff --git a/System.Device.Spi/packages.config b/System.Device.Spi/packages.config
index 4e3af4287..5be22f089 100644
--- a/System.Device.Spi/packages.config
+++ b/System.Device.Spi/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.5-alpha.145.6" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.9.0-preview.27" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.9.0-preview.28" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Device.Gpio" version="1.0.0-preview.42" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.4.194" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file
diff --git a/Test/SpiHardwareUnitTests/SpiHardwareUnitTests.nfproj b/Test/SpiHardwareUnitTests/SpiHardwareUnitTests.nfproj
index 4832f0363..9720778af 100644
--- a/Test/SpiHardwareUnitTests/SpiHardwareUnitTests.nfproj
+++ b/Test/SpiHardwareUnitTests/SpiHardwareUnitTests.nfproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="Current" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup Label="Globals">
     <NanoFrameworkProjectSystemPath>$(MSBuildToolsPath)..\..\..\nanoFramework\v1.0\</NanoFrameworkProjectSystemPath>
@@ -32,11 +32,11 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.10.5-alpha.145.6\lib\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.10.5-preview.4\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.9.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.Runtime.Events.1.9.0-preview.27\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.Runtime.Events.1.9.0-preview.28\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.TestFramework, Version=1.0.122.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
diff --git a/Test/SpiHardwareUnitTests/packages.config b/Test/SpiHardwareUnitTests/packages.config
index c22bf3778..23d856b25 100644
--- a/Test/SpiHardwareUnitTests/packages.config
+++ b/Test/SpiHardwareUnitTests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.5-alpha.145.6" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.9.0-preview.27" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.9.0-preview.28" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Device.Gpio" version="1.0.0-preview.42" targetFramework="netnanoframework10" />
   <package id="nanoFramework.TestFramework" version="1.0.122" targetFramework="netnanoframework10" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Device.Spi.nuspec b/nanoFramework.System.Device.Spi.nuspec
index b19749d9a..bf59206c9 100644
--- a/nanoFramework.System.Device.Spi.nuspec
+++ b/nanoFramework.System.Device.Spi.nuspec
@@ -21,7 +21,7 @@ This package requires a target with System.Device.Spi v$nativeVersion$ (checksum
     <summary>System.Device.Spi assembly for .NET nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf System.Device.Spi</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.10.5-alpha.145.6" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.10.5-preview.4" />
     </dependencies>
   </metadata>
   <files>