diff --git a/System.IO.Ports/System.IO.Ports.nfproj b/System.IO.Ports/System.IO.Ports.nfproj
index 31734cc..e3dce3e 100644
--- a/System.IO.Ports/System.IO.Ports.nfproj
+++ b/System.IO.Ports/System.IO.Ports.nfproj
@@ -38,10 +38,10 @@
     </NFMDP_PE_ExcludeClassByName>
   </ItemGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.5-preview.13\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.5-preview.18\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.9.1-preview.5\lib\nanoFramework.Runtime.Events.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.9.1-preview.7\lib\nanoFramework.Runtime.Events.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -66,15 +66,15 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.5-preview.13\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.5-preview.18\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.9.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.9.1-preview.5\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.9.1-preview.7\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.1.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Text.1.1.1-preview.61\lib\nanoFramework.System.Text.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Text.1.1.1-preview.64\lib\nanoFramework.System.Text.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
@@ -91,4 +91,4 @@
     </PropertyGroup>
     <Error Condition="!Exists('..\packages\Nerdbank.GitVersioning.3.4.194\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Nerdbank.GitVersioning.3.4.194\build\Nerdbank.GitVersioning.targets'))" />
   </Target>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/System.IO.Ports/packages.config b/System.IO.Ports/packages.config
index 8b645fb..c67ff0e 100644
--- a/System.IO.Ports/packages.config
+++ b/System.IO.Ports/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.13" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.9.1-preview.5" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Text" version="1.1.1-preview.61" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.18" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.9.1-preview.7" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Text" version="1.1.1-preview.64" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.4.194" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file
diff --git a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
index e70580b..2bbfb6b 100644
--- a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
+++ b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
@@ -39,27 +39,27 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.10.5-preview.13\lib\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.10.5-preview.18\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Hardware.Esp32, Version=1.3.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.Hardware.Esp32.1.3.3-preview.21\lib\nanoFramework.Hardware.Esp32.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.Hardware.Esp32.1.3.3-preview.22\lib\nanoFramework.Hardware.Esp32.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.9.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.Runtime.Events.1.9.1-preview.5\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.Runtime.Events.1.9.1-preview.7\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.1.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.Text.1.1.1-preview.61\lib\nanoFramework.System.Text.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.Text.1.1.1-preview.64\lib\nanoFramework.System.Text.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="nanoFramework.TestFramework, Version=1.0.136.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.1.0.136\lib\nanoFramework.TestFramework.dll</HintPath>
+    <Reference Include="nanoFramework.TestFramework, Version=1.0.138.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\..\packages\nanoFramework.TestFramework.1.0.138\lib\nanoFramework.TestFramework.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.UnitTestLauncher, Version=0.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.1.0.136\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.1.0.138\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
@@ -70,11 +70,11 @@
       <ProjectConfigurationsDeclaredAsItems />
     </ProjectCapabilities>
   </ProjectExtensions>
-  <Import Project="..\..\packages\nanoFramework.TestFramework.1.0.136\build\nanoFramework.TestFramework.targets" Condition="Exists('..\..\packages\nanoFramework.TestFramework.1.0.136\build\nanoFramework.TestFramework.targets')" />
+  <Import Project="..\..\packages\nanoFramework.TestFramework.1.0.138\build\nanoFramework.TestFramework.targets" Condition="Exists('..\..\packages\nanoFramework.TestFramework.1.0.138\build\nanoFramework.TestFramework.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>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=322105.The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\..\packages\nanoFramework.TestFramework.1.0.136\build\nanoFramework.TestFramework.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\nanoFramework.TestFramework.1.0.136\build\nanoFramework.TestFramework.targets'))" />
+    <Error Condition="!Exists('..\..\packages\nanoFramework.TestFramework.1.0.138\build\nanoFramework.TestFramework.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\nanoFramework.TestFramework.1.0.138\build\nanoFramework.TestFramework.targets'))" />
   </Target>
 </Project>
diff --git a/Tests/UnitTestsSerialPort/packages.config b/Tests/UnitTestsSerialPort/packages.config
index 008f882..c1a29a4 100644
--- a/Tests/UnitTestsSerialPort/packages.config
+++ b/Tests/UnitTestsSerialPort/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.13" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Hardware.Esp32" version="1.3.3-preview.21" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.9.1-preview.5" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Text" version="1.1.1-preview.61" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.TestFramework" version="1.0.136" targetFramework="netnanoframework10" developmentDependency="true" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.18" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Hardware.Esp32" version="1.3.3-preview.22" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.9.1-preview.7" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Text" version="1.1.1-preview.64" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.TestFramework" version="1.0.138" targetFramework="netnanoframework10" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.IO.Ports.nuspec b/nanoFramework.System.IO.Ports.nuspec
index fdc06f9..ed10011 100644
--- a/nanoFramework.System.IO.Ports.nuspec
+++ b/nanoFramework.System.IO.Ports.nuspec
@@ -15,13 +15,14 @@
     <iconUrl>https://secure.gravatar.com/avatar/97d0e092247f0716db6d4b47b7d1d1ad</iconUrl>
     <repository type="git" url="https://github.com/nanoframework/System.IO.Ports" commit="$commit$" />
     <copyright>Copyright (c) .NET Foundation and Contributors</copyright>
-    <description>This package includes the System.IO.Ports assembly for .NET nanoFramework C# projects.&#10;This package requires a target with System.IO.Ports v$nativeVersion$ (checksum $checksum$).</description>
+    <description>This package includes the System.IO.Ports assembly for .NET nanoFramework C# projects.
+This package requires a target with System.IO.Ports v$nativeVersion$ (checksum $checksum$).</description>
     <summary>System.IO.Ports assembly for nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf System.IO.Ports</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.10.5-preview.13" />
-      <dependency id="nanoFramework.Runtime.Events" version="1.9.1-preview.5" />
-      <dependency id="nanoFramework.System.Text" version="1.1.1-preview.61" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.10.5-preview.18" />
+      <dependency id="nanoFramework.Runtime.Events" version="1.9.1-preview.7" />
+      <dependency id="nanoFramework.System.Text" version="1.1.1-preview.64" />
     </dependencies>
   </metadata>
   <files>