diff --git a/System.IO.Ports/Properties/AssemblyInfo.cs b/System.IO.Ports/Properties/AssemblyInfo.cs
index bc57060..20c4319 100644
--- a/System.IO.Ports/Properties/AssemblyInfo.cs
+++ b/System.IO.Ports/Properties/AssemblyInfo.cs
@@ -12,11 +12,6 @@
 [assembly: AssemblyProduct("nanoFramework.System.IO.Ports")]
 [assembly: AssemblyCopyright("Copyright (c) .NET Foundation and Contributors")]
 
-////////////////////////////////////////////////////////////////
-// update this whenever the native assembly signature changes //
-[assembly: AssemblyNativeVersion("100.2.0.1")]
-////////////////////////////////////////////////////////////////
-
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
diff --git a/System.IO.Ports/System.IO.Ports.nfproj b/System.IO.Ports/System.IO.Ports.nfproj
index 99922cf..996de0f 100644
--- a/System.IO.Ports/System.IO.Ports.nfproj
+++ b/System.IO.Ports/System.IO.Ports.nfproj
@@ -61,7 +61,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.52\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.63\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.13\lib\netnano1.0\nanoFramework.Runtime.Events.dll</HintPath>
diff --git a/System.IO.Ports/packages.config b/System.IO.Ports/packages.config
index 0b3678b..830604d 100644
--- a/System.IO.Ports/packages.config
+++ b/System.IO.Ports/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.63" targetFramework="netnano1.0" />
   <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.22" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.23" targetFramework="netnano1.0" />
diff --git a/System.IO.Ports/packages.lock.json b/System.IO.Ports/packages.lock.json
index 896e333..0b6b5bb 100644
--- a/System.IO.Ports/packages.lock.json
+++ b/System.IO.Ports/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.52, 2.0.0-preview.52]",
-        "resolved": "2.0.0-preview.52",
-        "contentHash": "cV9JEhoc2OV/UL602i5xmEwQpnn/gzVMlDTAIAMRxCNwBKNYLO9U50OkJykpGnO2SULTsmvFqQWEGZiuANBZHw=="
+        "requested": "[2.0.0-preview.63, 2.0.0-preview.63]",
+        "resolved": "2.0.0-preview.63",
+        "contentHash": "M2qEbjY8Uh5jpgrqDD7vJf2YXk3CmGbTHkb/t6w4F/aNyetOYk0LyekdwUSF0kZ+gTNMH/y6CTHBbJfgtMbIeA=="
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
diff --git a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
index 5a188b7..1fb29ff 100644
--- a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
+++ b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
@@ -41,7 +41,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.52\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.63\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Hardware.Esp32, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\..\packages\nanoFramework.Hardware.Esp32.2.0.0-preview.12\lib\netnano1.0\nanoFramework.Hardware.Esp32.dll</HintPath>
diff --git a/Tests/UnitTestsSerialPort/packages.config b/Tests/UnitTestsSerialPort/packages.config
index db4c9c0..dc992f7 100644
--- a/Tests/UnitTestsSerialPort/packages.config
+++ b/Tests/UnitTestsSerialPort/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.63" targetFramework="netnano1.0" />
   <package id="nanoFramework.Hardware.Esp32" version="2.0.0-preview.12" targetFramework="netnano1.0" />
   <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.22" targetFramework="netnano1.0" />
diff --git a/Tests/UnitTestsSerialPort/packages.lock.json b/Tests/UnitTestsSerialPort/packages.lock.json
index e6b7022..4bef9c2 100644
--- a/Tests/UnitTestsSerialPort/packages.lock.json
+++ b/Tests/UnitTestsSerialPort/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.52, 2.0.0-preview.52]",
-        "resolved": "2.0.0-preview.52",
-        "contentHash": "cV9JEhoc2OV/UL602i5xmEwQpnn/gzVMlDTAIAMRxCNwBKNYLO9U50OkJykpGnO2SULTsmvFqQWEGZiuANBZHw=="
+        "requested": "[2.0.0-preview.63, 2.0.0-preview.63]",
+        "resolved": "2.0.0-preview.63",
+        "contentHash": "M2qEbjY8Uh5jpgrqDD7vJf2YXk3CmGbTHkb/t6w4F/aNyetOYk0LyekdwUSF0kZ+gTNMH/y6CTHBbJfgtMbIeA=="
       },
       "nanoFramework.Hardware.Esp32": {
         "type": "Direct",
diff --git a/nanoFramework.System.IO.Ports.nuspec b/nanoFramework.System.IO.Ports.nuspec
index fca1a36..dfb3ee5 100644
--- a/nanoFramework.System.IO.Ports.nuspec
+++ b/nanoFramework.System.IO.Ports.nuspec
@@ -16,11 +16,11 @@
     <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.
-This package requires a target with System.IO.Ports v$nativeVersion$ (checksum $checksum$).</description>
-    <tags>nanoFramework C# csharp netmf netnf System.IO.Ports</tags>
+This package requires a target with System.IO.Ports native contract hash $nativeContractHash$.</description>
+    <tags>nanoFramework C# csharp netmf netnf System.IO.Ports nfnc-$nativeContractHash$</tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.63" />
         <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" />
         <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.22" />
       </group>