diff --git a/GitVersion.yml b/GitVersion.yml
new file mode 100644
index 0000000..00dcb15
--- /dev/null
+++ b/GitVersion.yml
@@ -0,0 +1,28 @@
+next-version: 1.0.0
+assembly-versioning-scheme: MajorMinorPatch
+build-metadata-padding: 3
+legacy-semver-padding: 3
+assembly-informational-format: '{LegacySemVerPadded}'
+major-version-bump-message: '\+semver:\s?(breaking|major)'
+minor-version-bump-message: '\+semver:\s?(feature|minor)'
+patch-version-bump-message: '\+semver:\s?(fix|patch)'
+commit-message-incrementing: MergeMessageOnly
+branches:
+  master:
+    mode: ContinuousDelivery
+    tag:
+    increment: Patch
+    prevent-increment-of-merged-branch-version: true
+    track-merge-target: false
+  develop:
+    mode: ContinuousDeployment
+    tag: preview
+    increment: Minor
+    prevent-increment-of-merged-branch-version: false
+    track-merge-target: true
+  release:
+    tag: rc
+  (pull|pull\-requests|pr)[/-]:
+    tag: alpha
+ignore:
+  sha: []
diff --git a/appveyor.yml b/appveyor.yml
index 9d1d37d..b14128f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,30 +1,302 @@
-version: 1.0.{build}
-pull_requests:
-  do_not_increment_build_number: true
-image: Visual Studio 2017
-clone_depth: 1
-install:
-- ps: .\install-vsix-appveyor.ps1
-build_script:
-- ps: >-
-
-    nuget restore source\nanoFramework.Windows.Devices.Spi.sln
-
-    msbuild source\nanoFramework.Windows.Devices.Spi.sln /p:Configuration=Release  /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
-
-artifacts:
-- path: '**\bin\Release\*.nupkg'
-  name: Nuget Packages
-deploy:
-- provider: NuGet
-  api_key:
-    secure: NSRDXbS8tmzOy4wStGuO3yQMKI8Sk10vF8iQtz9ZDXEnHfwnuDdnXbr/Kno3MMvY
-  skip_symbols: true
-notifications:
-- provider: Slack
-  auth_token:
-    secure: 2tqAJTTbN2dm24Vrwo5TXun3Vxc34R5G9l7o3pK3xEuKZAzxx3nbP2yGkMI/kl3+NxHXknjBfZnkhZC5eLYBHb+jO7YVUZwPYOfC/ZGy5HU=
-  channel: '#build-monitor'
-  on_build_status_changed: true
-  on_build_success: false
-  on_build_failure: false
+# configuration for "master" branch
+-
+  branches:
+    only:
+      - master
+
+  image: Visual Studio 2017
+
+  skip_branch_with_pr: true
+
+  # Skipping commits affecting specific files
+  skip_commits:
+    files:
+    - '**\AssemblyInfo.*'
+    - '**/*.md'
+    - 'LICENSE'
+    - dir/*
+    - '.gitignore'
+
+  build:
+    verbosity: minimal
+
+  test: off
+
+  environment:
+    APPVEYOR_SAVE_CACHE_ON_ERROR: true
+    matrix:
+      - RUBY_VERSION: 24
+    GitHubUserName:
+      secure: 7OBtVAMTodMWK20wg6pGnQ==
+    GitHubUserEmail:
+      secure: HeABB68Sn/Lhbd69C2cUcfWv0ab/rMDEcOLvcxf8gGw=
+    GitHubToken:
+      secure: WOqlCsnwTzfDPJFoNV/h8mEESIpG/9uFn1u6oE8hGZtXwIQQlsY+NyyLt9Y5xoFn
+
+  init:
+    - git config --global core.autocrlf true
+    - git config --global credential.helper store
+    - ps: Add-Content "$env:USERPROFILE\.git-credentials" "https://$($env:GitHubToken):x-oauth-basic@github.com`n"
+    - git config --global user.email "%GitHubUserEmail%"
+    - git config --global user.name "%GitHubUserName%"
+
+  install:
+    - set PATH=C:\Ruby%RUBY_VERSION%\bin;%PATH%
+    - gem install github_changelog_generator --quiet --no-ri --no-rdoc
+    # - bundle install
+    - choco install gitversion.portable -pre -y
+    - ps: .\install-vsix-appveyor.ps1
+
+  before_build:
+  - ps: >-
+
+      nuget restore source\nanoFramework.Windows.Devices.Spi.sln
+
+      gitversion /l console /output buildserver /updateAssemblyInfo /ensureassemblyinfo
+
+  build_script:
+  - ps: >-
+
+      msbuild source\nanoFramework.Windows.Devices.Spi.sln /p:Configuration=Release /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
+
+  before_deploy:
+  # need this to keep ruby happy
+  - ps: md c:\tmp
+  - bundle exec github_changelog_generator --token %GitHubToken%
+  # add here the updated changelog and the updated assembly info files
+  - git add .
+  - git commit --amend --no-edit
+
+  artifacts:
+  - path: '**\bin\Release\*.nupkg'
+    name: Nuget_Packages
+
+  deploy:
+  - provider: NuGet
+    api_key:
+      secure: NSRDXbS8tmzOy4wStGuO3yQMKI8Sk10vF8iQtz9ZDXEnHfwnuDdnXbr/Kno3MMvY
+    skip_symbols: true
+    on:
+      appveyor_repo_tag: true
+  - provider: GitHub
+    tag: v$(GitVersion_NuGetVersionV2)
+    release: nanoFramework Core Library v$(gitversion_semver)
+    description: '[CHANGELOG.md](https://github.com/nanoframework/lib-nanoFramework.Windows.Devices.Spi/blob/master/CHANGELOG.md)\n\n## Install from NuGet\n\nThe following NuGet packages are available for download from this release\n\n:package: [.NET](https://www.nuget.org/packages/nanoFramework.Windows.Devices.Spi/$(GitVersion_NuGetVersionV2)) v$(GitVersion_NuGetVersionV2)'
+    auth_token:
+      secure: DNixoFFE+pGlwyhj7McfZoln42vOmj0iY1iNV9zXEr3y0NpXlOIgL8k5ehzlFM1S
+    artifact: Nuget_Packages
+    draft: true
+    prerelease: true
+    force_update: true
+
+  notifications:
+  - provider: Slack
+    auth_token:
+      secure: 2tqAJTTbN2dm24Vrwo5TXun3Vxc34R5G9l7o3pK3xEuKZAzxx3nbP2yGkMI/kl3+NxHXknjBfZnkhZC5eLYBHb+jO7YVUZwPYOfC/ZGy5HU=
+    channel: '#build-monitor'
+    on_build_status_changed: true
+    on_build_success: false
+    on_build_failure: false
+
+  cache:
+    - source\packages -> **source\packages.config
+    - C:\ProgramData\chocolatey\bin -> appveyor.yml
+    - C:\ProgramData\chocolatey\lib -> appveyor.yml
+
+
+####################################
+# configuration for develop branches
+-
+  branches:
+    only:
+      - /dev.*/
+
+  image: Visual Studio 2017
+
+  skip_branch_with_pr: true
+
+  # Do not build on tags
+  skip_tags: false
+
+  test: off
+  
+  pull_requests:
+    do_not_increment_build_number: true
+
+  # Skipping commits affecting specific files
+  skip_commits:
+    files:
+    - '**\AssemblyInfo.*'
+    - '**/*.md'
+    - 'LICENSE'
+    - dir/*
+    - '.gitignore'
+
+  build:
+    verbosity: minimal
+
+  install:
+    - choco install gitversion.portable -pre -y
+    - ps: .\install-vsix-appveyor.ps1
+
+  before_build:
+  - ps: >-
+
+      nuget restore source\nanoFramework.Windows.Devices.Spi.sln
+
+      gitversion /l console /output buildserver /updateAssemblyInfo /ensureassemblyinfo
+
+  build_script:
+  - ps: >-
+
+      msbuild source\nanoFramework.Windows.Devices.Spi.sln /p:Configuration=Release /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
+
+  on_success:
+  # for this environment variable to work here it has to be set in AppVeyor UI
+  - nuget push source\Nuget.Windows.Devices.Spi\bin\Release\nanoFramework.Windows.Devices.Spi.%GitVersion_NuGetVersionV2%.nupkg %MyGetToken% -Source https://www.myget.org/F/nanoframework-dev/api/v2/package
+  - nuget push source\Nuget.Windows.Devices.Spi.DELIVERABLES\bin\Release\nanoFramework.Windows.Devices.Spi.DELIVERABLES.%GitVersion_NuGetVersionV2%.nupkg %MyGetToken% -Source https://www.myget.org/F/nanoframework-dev/api/v2/package
+
+  artifacts:
+  - path: '**\bin\Release\*.nupkg'
+    name: Nuget_Packages
+
+  deploy:
+  # the provider is actually MyGet but works the same as NuGet
+  - provider: NuGet
+    server: https://www.myget.org/F/nanoframework-dev/api/v2/package
+    api_key:
+      secure: 0drE56FivPFYI3oVZWcVFTpjOXSqyjT6kGangIxFRcRLqMhV3lQHqUButuuiPM+N
+    skip_symbols: true
+  - provider: GitHub
+    tag: v$(GitVersion_NuGetVersionV2)
+    release: nanoFramework Core Library v$(gitversion_semver)
+    description: '[CHANGELOG.md](https://github.com/nanoframework/lib-Windows.Devices.Spi/blob/master/CHANGELOG.md)\n\n## Install from NuGet\n\nThe following NuGet packages are available for download from this release\n\n:package: [.NET](https://www.nuget.org/packages/nanoFramework.Windows.Devices.Spi/$(GitVersion_NuGetVersionV2)) v$(GitVersion_NuGetVersionV2)'
+    auth_token:
+      secure: DNixoFFE+pGlwyhj7McfZoln42vOmj0iY1iNV9zXEr3y0NpXlOIgL8k5ehzlFM1S
+    artifact: Nuget_Packages
+    draft: true
+    prerelease: true
+    force_update: true
+
+  notifications:
+  - provider: Slack
+    auth_token:
+      secure: 2tqAJTTbN2dm24Vrwo5TXun3Vxc34R5G9l7o3pK3xEuKZAzxx3nbP2yGkMI/kl3+NxHXknjBfZnkhZC5eLYBHb+jO7YVUZwPYOfC/ZGy5HU=
+    channel: '#build-monitor'
+    on_build_status_changed: true
+    on_build_success: false
+    on_build_failure: false
+
+  cache:
+    - source\packages -> **source\packages.config
+    - C:\ProgramData\chocolatey\bin -> appveyor.yml
+    - C:\ProgramData\chocolatey\lib -> appveyor.yml
+
+############################################
+# configuration for release candidate branch
+-
+  branches:
+    only:
+      - release.*
+
+  image: Visual Studio 2017
+
+  skip_branch_with_pr: true
+
+  # OK to get only last commit as we don't need history
+  clone_depth: 1
+
+  # Skipping commits affecting specific files
+  skip_commits:
+    files:
+    - '**\AssemblyInfo.*'
+    - '**/*.md'
+    - 'LICENSE'
+    - dir/*
+    - '.gitignore'
+
+  build:
+    verbosity: minimal
+
+  test: off
+
+  environment:
+    matrix:
+      - RUBY_VERSION: 24
+    GitHubUserName:
+      secure: 7OBtVAMTodMWK20wg6pGnQ==
+    GitHubUserEmail:
+      secure: HeABB68Sn/Lhbd69C2cUcfWv0ab/rMDEcOLvcxf8gGw=
+    GitHubToken:
+      secure: WOqlCsnwTzfDPJFoNV/h8mEESIpG/9uFn1u6oE8hGZtXwIQQlsY+NyyLt9Y5xoFn
+
+  init:
+    - git config --global core.autocrlf true
+    - git config --global credential.helper store
+    - ps: Add-Content "$env:USERPROFILE\.git-credentials" "https://$($env:GitHubToken):x-oauth-basic@github.com`n"
+    - git config --global user.email "%GitHubUserEmail%"
+    - git config --global user.name "%GitHubUserName%"
+
+  install:
+    - set PATH=C:\Ruby%RUBY_VERSION%\bin;%PATH%
+    - bundle config --local path vendor/bundle
+    - gem install bundler --quiet --no-ri --no-rdoc
+    - gem install github_changelog_generator --quiet --no-ri --no-rdoc
+    # - bundle install
+    - choco install gitversion.portable -pre -y
+    - ps: .\install-vsix-appveyor.ps1
+
+  before_build:
+  - ps: >-
+
+      nuget restore source\nanoFramework.Windows.Devices.Spi.sln
+        
+      gitversion /l console /output buildserver /updateAssemblyInfo /ensureassemblyinfo
+
+  build_script:
+  - ps: >-
+
+      msbuild source\nanoFramework.Windows.Devices.Spi.sln /p:Configuration=Release /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
+
+  before_deploy:
+  # need this to keep ruby happy
+  - ps: md c:\tmp
+  - bundle exec github_changelog_generator --token %GitHubToken%
+  # add here the updated changelog and the updated assembly info files
+  - git add .
+  - git commit --amend --no-edit
+
+  artifacts:
+  - path: '**\bin\Release\*.nupkg'
+    name: Nuget_Packages
+
+  deploy:
+  - provider: NuGet
+    api_key:
+      secure: NSRDXbS8tmzOy4wStGuO3yQMKI8Sk10vF8iQtz9ZDXEnHfwnuDdnXbr/Kno3MMvY
+    skip_symbols: true
+
+  - provider: GitHub
+    tag: v$(GitVersion_NuGetVersionV2)
+    release: nanoFramework Core Library v$(gitversion_semver)
+    description: '[CHANGELOG.md](https://github.com/nanoframework/lib-Windows.Devices.Spi/blob/master/CHANGELOG.md)\n\n## Install from NuGet\n\nThe following NuGet packages are available for download from this release\n\n:package: [.NET](https://www.nuget.org/packages/nanoFramework.Windows.Devices.Spi/$(GitVersion_NuGetVersionV2)) v$(GitVersion_NuGetVersionV2)'
+    auth_token:
+      secure: DNixoFFE+pGlwyhj7McfZoln42vOmj0iY1iNV9zXEr3y0NpXlOIgL8k5ehzlFM1S
+    artifact: Nuget_Packages
+    draft: true
+    prerelease: true
+    force_update: true
+
+  notifications:
+  - provider: Slack
+    auth_token:
+      secure: 2tqAJTTbN2dm24Vrwo5TXun3Vxc34R5G9l7o3pK3xEuKZAzxx3nbP2yGkMI/kl3+NxHXknjBfZnkhZC5eLYBHb+jO7YVUZwPYOfC/ZGy5HU=
+    channel: '#build-monitor'
+    on_build_status_changed: true
+    on_build_success: false
+    on_build_failure: false
+
+  cache:
+    - source\packages -> **source\packages.config
+    - C:\ProgramData\chocolatey\bin -> appveyor.yml
+    - C:\ProgramData\chocolatey\lib -> appveyor.yml
diff --git a/source/AssemblyInfo.cs b/source/AssemblyInfo.cs
index f6f8dd5..b3aa196 100644
--- a/source/AssemblyInfo.cs
+++ b/source/AssemblyInfo.cs
@@ -15,5 +15,6 @@
 //      Build Number
 //      Revision
 //
-[assembly: AssemblyVersion("1.0.0.19")]
-[assembly: AssemblyFileVersion("1.0.0.19")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: AssemblyInformationalVersion("1.0.0.0")]
diff --git a/source/Nuget.Windows.Devices.Spi.DELIVERABLES/Nuget.Windows.Devices.Spi.DELIVERABLES.nuproj b/source/Nuget.Windows.Devices.Spi.DELIVERABLES/Nuget.Windows.Devices.Spi.DELIVERABLES.nuproj
index bf7c25c..7d71f91 100644
--- a/source/Nuget.Windows.Devices.Spi.DELIVERABLES/Nuget.Windows.Devices.Spi.DELIVERABLES.nuproj
+++ b/source/Nuget.Windows.Devices.Spi.DELIVERABLES/Nuget.Windows.Devices.Spi.DELIVERABLES.nuproj
@@ -33,6 +33,11 @@
       <Link>content\disasm\%(RecursiveDir)%(Filename)%(Extension)</Link>
     </Content>
   </ItemGroup>
+  <ItemGroup>
+    <Dependency Include="nanoFramework.CoreLibrary">
+      <Version>[1.0.0-preview038]</Version>
+    </Dependency>
+  </ItemGroup>  
   <PropertyGroup Label="Globals">
     <ProjectGuid>F117EC96-3B2D-4F2F-8683-BF72CA910624</ProjectGuid>
   </PropertyGroup>
@@ -42,7 +47,7 @@
   <Import Project="$(NuProjPath)\NuProj.props" Condition="Exists('$(NuProjPath)\NuProj.props')" />
   <PropertyGroup Label="Configuration">
     <Id>nanoFramework.Windows.Devices.Spi.DELIVERABLES</Id>
-    <Version>1.0.0-preview019</Version>
+    <Version>$(GitVersion_NuGetVersionV2)</Version>
     <Title>nanoFramework.Windows.Devices.Spi.DELIVERABLES</Title>
     <Authors>nanoFramework project contributors</Authors>
     <Owners>nanoFramework project contributors</Owners>
diff --git a/source/Nuget.Windows.Devices.Spi/Nuget.Windows.Devices.Spi.nuproj b/source/Nuget.Windows.Devices.Spi/Nuget.Windows.Devices.Spi.nuproj
index 8990440..72d2912 100644
--- a/source/Nuget.Windows.Devices.Spi/Nuget.Windows.Devices.Spi.nuproj
+++ b/source/Nuget.Windows.Devices.Spi/Nuget.Windows.Devices.Spi.nuproj
@@ -32,7 +32,7 @@
   </ItemGroup>
   <ItemGroup>
     <Dependency Include="nanoFramework.CoreLibrary">
-      <Version>[1.0.0-preview028]</Version>
+      <Version>[1.0.0-preview038]</Version>
     </Dependency>
   </ItemGroup>
   <PropertyGroup Label="Globals">
@@ -44,7 +44,7 @@
   <Import Project="$(NuProjPath)\NuProj.props" Condition="Exists('$(NuProjPath)\NuProj.props')" />
   <PropertyGroup Label="Configuration">
     <Id>nanoFramework.Windows.Devices.Spi</Id>
-    <Version>1.0.0-preview019</Version>
+    <Version>$(GitVersion_NuGetVersionV2)</Version>
     <Title>nanoFramework.Windows.Devices.Spi</Title>
     <Authors>nanoFramework project contributors</Authors>
     <Owners>nanoFramework project contributors</Owners>
diff --git a/source/Windows.Devices.Spi.nfproj b/source/Windows.Devices.Spi.nfproj
index 9653acc..d74a686 100644
--- a/source/Windows.Devices.Spi.nfproj
+++ b/source/Windows.Devices.Spi.nfproj
@@ -8,13 +8,14 @@
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectTypeGuids>{11A8DD76-328B-46DF-9F39-F559912D0360};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <ProjectGuid>{A1042594-0DF3-427A-99E1-F77F862EC2F2}</ProjectGuid>
     <OutputType>Library</OutputType>
     <FileAlignment>512</FileAlignment>
     <RootNamespace>
     </RootNamespace>
     <AssemblyName>Windows.Devices.Spi</AssemblyName>
-    <NFTargetVersion>v1.0</NFTargetVersion>
+    <TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
     <NF_IsCoreLibrary>True</NF_IsCoreLibrary>
     <DocumentationFile>bin\$(Configuration)\Windows.Devices.Spi.xml</DocumentationFile>
   </PropertyGroup>
@@ -44,7 +45,7 @@
     <NFMDP_CMD_LINE_OUTPUT>false</NFMDP_CMD_LINE_OUTPUT>
   </PropertyGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="packages\nanoFramework.CoreLibrary.1.0.0-preview028\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="packages\nanoFramework.CoreLibrary.1.0.0-preview038\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -65,13 +66,8 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.0.0.28, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>packages\nanoFramework.CoreLibrary.1.0.0-preview028\lib\mscorlib.dll</HintPath>
-      <Private>True</Private>
-      <SpecificVersion>True</SpecificVersion>
-    </Reference>
-    <Reference Include="mscorlib, Version=1.0.0.28, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>packages\nanoFramework.CoreLibrary.1.0.0-preview028\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>packages\nanoFramework.CoreLibrary.1.0.0-preview038\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
       <SpecificVersion>True</SpecificVersion>
     </Reference>
diff --git a/source/nanoFramework.Windows.Devices.Spi.sln b/source/nanoFramework.Windows.Devices.Spi.sln
index 36884d3..bd684c0 100644
--- a/source/nanoFramework.Windows.Devices.Spi.sln
+++ b/source/nanoFramework.Windows.Devices.Spi.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.26430.14
+VisualStudioVersion = 15.0.27004.2010
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{11A8DD76-328B-46DF-9F39-F559912D0360}") = "Windows.Devices.Spi", "Windows.Devices.Spi.nfproj", "{A1042594-0DF3-427A-99E1-F77F862EC2F2}"
 EndProject
@@ -31,15 +31,16 @@ Global
 		{A1042594-0DF3-427A-99E1-F77F862EC2F2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A1042594-0DF3-427A-99E1-F77F862EC2F2}.Release|Any CPU.Build.0 = Release|Any CPU
 		{298761A4-D2D4-4C23-B280-89034582C925}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{298761A4-D2D4-4C23-B280-89034582C925}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{298761A4-D2D4-4C23-B280-89034582C925}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{298761A4-D2D4-4C23-B280-89034582C925}.Release|Any CPU.Build.0 = Release|Any CPU
 		{F117EC96-3B2D-4F2F-8683-BF72CA910624}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{F117EC96-3B2D-4F2F-8683-BF72CA910624}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F117EC96-3B2D-4F2F-8683-BF72CA910624}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F117EC96-3B2D-4F2F-8683-BF72CA910624}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {DD82D7FF-B798-48A4-8506-2FBA0001D32F}
+	EndGlobalSection
 EndGlobal
diff --git a/source/packages.config b/source/packages.config
index b627caf..5059e8f 100644
--- a/source/packages.config
+++ b/source/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.0.0-preview028" targetFramework="net46" />
+  <package id="nanoFramework.CoreLibrary" version="1.0.0-preview038" targetFramework="netnanoframework10" />
   <package id="NuProj" version="0.20.4-beta" targetFramework="net46" developmentDependency="true" />
   <package id="NuProj.Common" version="0.20.4-beta" targetFramework="net46" developmentDependency="true" />
 </packages>
\ No newline at end of file